using System; using System.Collections; using System.Collections.Generic; using System.Diagnostics; using System.IO; using System.Linq; using System.Numerics; using System.Text; using static System.Math; using static Extensions; using static MathExtensions; public struct Expr { public static readonly Monoid Monoid = new Monoid(new Expr(1), Concat); public ModInt32 A { get; } public ModInt32 B { get; } public ModInt32 C { get; } public bool HasOnlyA { get; } public Expr(int a) : this(new ModInt32(a)) { } public Expr(int a, int b, int c) : this(new ModInt32(a), new ModInt32(b), new ModInt32(c)) { } public Expr(ModInt32 a) { this.HasOnlyA = true; this.A = a; this.B = new ModInt32(0); this.C = new ModInt32(0); } public Expr(ModInt32 a, ModInt32 b, ModInt32 c) { this.HasOnlyA = false; this.A = a; this.B = b; this.C = c; } public int Evaluate(int l) => (l * this.A + this.B + this.C).Value; public static Expr Concat(Expr l, Expr r) => l.HasOnlyA ? r.HasOnlyA ? new Expr(l.A * r.A) : new Expr(l.A * r.A, r.B, r.C) : r.HasOnlyA ? new Expr(l.A, new ModInt32(0), l.B + l.C * r.A) : new Expr(l.A, l.B + l.C * r.A + r.B, r.C); } public static class Program { public static void Solve() { var n = I; Assert(3 <= n && n <= 100000 - 1); var c = Repeat(n, () => C).ToArray(); Repeat(n, i => Assert(((i & 1) == 0 ? "0123456789" : "+*").Contains(c[i]))); Expr Create(int i) { var r = c[i] - '0'; return i == 0 || c[i - 1] == '+' ? new Expr(1, 0, r) : new Expr(r); } var segtree = new SegmentTree( Repeat(n / 2, i => Create((i + 1) * 2)).ToArray(), Expr.Monoid); var q = I; Assert(1 <= q && q <= 100000); Repeat(q, i => { var (t, x, y) = (C, I, I); if (i == q - 1) Assert(t == '?'); else Assert("!?".Contains(t)); Assert(1 <= x && x < y && y <= n); if (t == '!') { Assert(x % 2 == y % 2); x--; y--; Swap(ref c[x], ref c[y]); segtree[(x - 1) / 2] = Create(x % 2 == 1 ? x + 1 : x); segtree[(y - 1) / 2] = Create(y % 2 == 1 ? y + 1 : y); } else { Assert(x % 2 == 1 && y % 2 == 1); x--; y--; var fxy = segtree[x / 2, y / 2 - 1].Evaluate(c[x] - '0'); Console.WriteLine(fxy); } }); } #region Scanners static Scanner _scanner; static char C => _scanner.NextChar(); static string S => _scanner.NextString(); static int I => _scanner.NextInt(); static long L => _scanner.NextLong(); static BigInteger B => _scanner.NextBigInteger(); static double D => _scanner.NextDouble(); static decimal M => _scanner.NextDecimal(); #endregion public static void Main() { var sw = new StreamWriter(Console.OpenStandardOutput()); sw.NewLine = "\n"; #if DEBUG sw.AutoFlush = true; #else sw.AutoFlush = false; #endif Console.SetOut(sw); _scanner = new Scanner(Console.OpenStandardInput()); Solve(); Console.Out.Flush(); } } public static partial class Extensions { } #region Library public class Scanner { private readonly Stream _stream; private const int _bufferSize = 1024; private readonly byte[] _buf = new byte[_bufferSize]; private int _len, _ptr; public Scanner(Stream stream) { _stream = stream; } public byte ReadByte() { if (_ptr >= _len) { _len = _stream.Read(_buf, 0, _bufferSize); _ptr = 0; } return _buf[_ptr++]; } public char ReadChar() => (char)ReadByte(); public string ReadLine() { var r = new StringBuilder(); if (_ptr == 0) r.Append(ReadChar()); for (; _ptr < _len; _ptr++) r.Append((char)_buf[_ptr]); return r.ToString(); } public char NextChar() => char.Parse(NextString()); public string NextString() { var r = new StringBuilder(); var b = ReadChar(); while (b != ' ' && b != '\n') { r.Append(b); b = ReadChar(); } return r.ToString(); } public int NextInt() => (int)NextLong(); public long NextLong() { var r = 0L; var b = ReadByte(); var n = b == '-'; if (n) b = ReadByte(); while (b != ' ' && b != '\n') { r = r * 10 + b - '0'; b = ReadByte(); } return n ? -r : r; } public BigInteger NextBigInteger() { var r = new BigInteger(); var b = ReadByte(); var n = b == '-'; if (n) b = ReadByte(); while (b != ' ' && b != '\n') { r = r * 10 + b - '0'; b = ReadByte(); } return n ? -r : r; } public double NextDouble() { var i = 0L; var b = ReadByte(); var n = b == '-'; if (n) b = ReadByte(); while (b != '.' && b != ' ' && b != '\n') { i = i * 10 + b - '0'; b = ReadByte(); } if (b != '.') return n ? -i : i; b = ReadByte(); var f = 0L; var p = 0; while (b != ' ' && b != '\n') { f = f * 10 + b - '0'; b = ReadByte(); p++; } var r = i + (double)f / MathExtensions.Pow(10, p); return n ? -r : r; } public decimal NextDecimal() => decimal.Parse(NextString()); public T Next(Converter parser) => parser(NextString()); } public class Monoid { public Monoid(T unit, Func append) { this.Unit = unit; this.Append = append; } public T Unit { get; } public Func Append { get; } } public static class Monoid { public static Monoid Create(T unit, Func append) => new Monoid(unit, append); public static readonly Monoid Min_Int32 = new Monoid(int.MaxValue, Min); public static readonly Monoid Max_Int32 = new Monoid(int.MinValue, Max); public static readonly Monoid Min_Int64 = new Monoid(long.MaxValue, Min); public static readonly Monoid Max_Int64 = new Monoid(long.MinValue, Max); } public class SegmentTree : IReadOnlyList { private readonly T[] _tree; private readonly int _size; public SegmentTree(int length, Monoid monoid) { if (length > (int.MaxValue >> 1) + 1) throw new ArgumentException(); _size = 1; while (_size < length) _size <<= 1; _tree = Enumerable.Repeat(monoid.Unit, _size << 1).ToArray(); this.Monoid = monoid; this.Length = length; } public SegmentTree(IList collection, Monoid monoid) { if (collection.Count > (int.MaxValue >> 1) + 1) throw new ArgumentException(); _size = 1; while (_size < collection.Count) _size <<= 1; _tree = new T[_size << 1]; for (var i = 0; i < _size; i++) _tree[i + _size] = i < collection.Count ? collection[i] : monoid.Unit; for (var i = _size - 1; i > 0; i--) _tree[i] = monoid.Append(_tree[i << 1], _tree[(i << 1) + 1]); this.Monoid = monoid; this.Length = collection.Count; } public Monoid Monoid { get; } public int Length { get; } int IReadOnlyCollection.Count => this.Length; public T this[int i] { get => _tree[i + _size]; set { _tree[i += _size] = value; for (i >>= 1; i > 0; i >>= 1) _tree[i] = this.Monoid.Append(_tree[i << 1], _tree[(i << 1) + 1]); } } public T this[int l, int r] { get { var lacc = this.Monoid.Unit; var racc = this.Monoid.Unit; for (l += _size, r += _size + 1; l < r; l >>= 1, r >>= 1) { if ((l & 1) != 0) lacc = this.Monoid.Append(lacc, _tree[l++]); if ((r & 1) != 0) racc = this.Monoid.Append(_tree[--r], racc); } return this.Monoid.Append(lacc, racc); } } public IEnumerator GetEnumerator() { for (var i = 0; i < this.Length; i++) yield return this[i]; } IEnumerator IEnumerable.GetEnumerator() => this.GetEnumerator(); } public struct ModInt32 : IEquatable { private long _value; public ModInt32(long value, int mod = 1000000007) { _value = value % mod; this.Mod = mod; } public int Value => (int)_value; public int Mod { get; private set; } public static ModInt32 operator +(ModInt32 value) => value; public static ModInt32 operator -(ModInt32 value) { if (value._value == 0) return value; var r = new ModInt32 { _value = value.Mod - value._value, Mod = value.Mod }; return r; } public static ModInt32 operator +(long left, ModInt32 right) => new ModInt32(left, right.Mod) + right; public static ModInt32 operator +(ModInt32 left, long right) => left + new ModInt32(right, left.Mod); public static ModInt32 operator +(ModInt32 left, ModInt32 right) { var r = new ModInt32 { _value = left._value + right._value, Mod = left.Mod }; if (r._value > r.Mod) r._value -= r.Mod; return r; } public static ModInt32 operator -(long left, ModInt32 right) => new ModInt32(left, right.Mod) - right; public static ModInt32 operator -(ModInt32 left, long right) => left - new ModInt32(right, left.Mod); public static ModInt32 operator -(ModInt32 left, ModInt32 right) { var r = new ModInt32 { _value = left._value - right._value, Mod = left.Mod }; if (r._value < 0) r._value += r.Mod; return left; } public static ModInt32 operator *(long left, ModInt32 right) => new ModInt32(left, right.Mod) * right; public static ModInt32 operator *(ModInt32 left, long right) => left * new ModInt32(right, left.Mod); public static ModInt32 operator *(ModInt32 left, ModInt32 right) => new ModInt32(left._value * right._value); public bool Equals(ModInt32 other) => _value == other._value && this.Mod == other.Mod; public override bool Equals(object obj) => obj is ModInt32 other ? this.Equals(other) : false; public override int GetHashCode() => _value.GetHashCode() ^ this.Mod; public override string ToString() => _value.ToString(); } [DebuggerStepThrough] public static partial class Extensions { public static void Assert(bool condition) { if (!condition) throw new Exception("Assertion failed"); } public static string AsString(this IEnumerable source) => new string(source.ToArray()); public static void ForEach(this IEnumerable source, Action action) { foreach (var item in source) action(item); } public static void ForEach(this IEnumerable source, Func func) { foreach (var item in source) func(item); } public static void ForEach(this IEnumerable source, Action action) { var i = 0; foreach (var item in source) action(item, i++); } public static void ForEach(this IEnumerable source, Func func) { var i = 0; foreach (var item in source) func(item, i++); } public static T Iterate(int count, T seed, Func func) { var r = seed; for (var i = 0; i < count; i++) r = func(r); return r; } public static void Repeat(int count, Action action) { for (var i = 0; i < count; i++) action(); } public static void Repeat(int count, Action action) { for (var i = 0; i < count; i++) action(i); } public static IEnumerable Repeat(Func func) { for (var i = 0; ; i++) yield return func(); } public static IEnumerable Repeat(int count, Func func) { for (var i = 0; i < count; i++) yield return func(); } public static IEnumerable Repeat(Func func) { for (var i = 0; ; i++) yield return func(i); } public static IEnumerable Repeat(int count, Func func) { for (var i = 0; i < count; i++) yield return func(i); } public static void Swap(ref T x, ref T y) { var tmp = x; x = y; y = tmp; } public static (T1[], T2[]) Unzip(this ICollection<(T1, T2)> source) { var ts1 = new T1[source.Count]; var ts2 = new T2[source.Count]; var i = 0; foreach (var (t1, t2) in source) { ts1[i] = t1; ts2[i] = t2; i++; } return (ts1, ts2); } public static (T1[], T2[], T3[]) Unzip(this ICollection<(T1, T2, T3)> source) { var ts1 = new T1[source.Count]; var ts2 = new T2[source.Count]; var ts3 = new T3[source.Count]; var i = 0; foreach (var (t1, t2, t3) in source) { ts1[i] = t1; ts2[i] = t2; ts3[i] = t3; i++; } return (ts1, ts2, ts3); } public static (T1[], T2[], T3[], T4[]) Unzip(this ICollection<(T1, T2, T3, T4)> source) { var ts1 = new T1[source.Count]; var ts2 = new T2[source.Count]; var ts3 = new T3[source.Count]; var ts4 = new T4[source.Count]; var i = 0; foreach (var (t1, t2, t3, t4) in source) { ts1[i] = t1; ts2[i] = t2; ts3[i] = t3; ts4[i] = t4; i++; } return (ts1, ts2, ts3, ts4); } public static IEnumerable Zip(this IEnumerable first, IEnumerable second, IEnumerable thrid, Func resultSelector) { using (var e1 = first.GetEnumerator()) using (var e2 = second.GetEnumerator()) using (var e3 = thrid.GetEnumerator()) { while (e1.MoveNext() && e2.MoveNext() && e3.MoveNext()) yield return resultSelector(e1.Current, e2.Current, e3.Current); } } public static IEnumerable Zip(this IEnumerable first, IEnumerable second, IEnumerable thrid, IEnumerable fourth, Func resultSelector) { using (var e1 = first.GetEnumerator()) using (var e2 = second.GetEnumerator()) using (var e3 = thrid.GetEnumerator()) using (var e4 = fourth.GetEnumerator()) { while (e1.MoveNext() && e2.MoveNext() && e3.MoveNext() && e4.MoveNext()) yield return resultSelector(e1.Current, e2.Current, e3.Current, e4.Current); } } } [DebuggerStepThrough] public static class MathExtensions { public static int Gcd(int left, int right) { int r; while ((r = left % right) != 0) { left = right; right = r; } return right; } public static long Gcd(long left, long right) { long r; while ((r = left % right) != 0L) { left = right; right = r; } return right; } public static BigInteger Gcd(BigInteger left, BigInteger right) => BigInteger.GreatestCommonDivisor(left, right); public static int HighestOneBit(int x) { x |= x >> 01; x |= x >> 02; x |= x >> 04; x |= x >> 08; x |= x >> 16; return x - (x >> 1); } public static long HighestOneBit(long x) { x |= x >> 01; x |= x >> 02; x |= x >> 04; x |= x >> 08; x |= x >> 16; x |= x >> 32; return x - (x >> 1); } public static int Lcm(int left, int right) => left / Gcd(left, right) * right; public static long Lcm(long left, long right) => left / Gcd(left, right) * right; public static BigInteger Lcm(BigInteger left, BigInteger right) => left / Gcd(left, right) * right; public static int Pow(int value, int exponent) { var r = 1; while (exponent > 0) { if ((exponent & 1) == 1) r *= value; value *= value; exponent >>= 1; } return r; } public static long Pow(long value, int exponent) { var r = 1L; while (exponent > 0) { if ((exponent & 1) == 1) r *= value; value *= value; exponent >>= 1; } return r; } public static long Fact(int value) { var r = 1L; for (var i = 2; i <= value; i++) r *= i; return r; } } #endregion