結果
| 問題 |
No.1008 Bench Craftsman
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-03-06 23:28:11 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 5,266 bytes |
| コンパイル時間 | 1,013 ms |
| コンパイル使用メモリ | 117,936 KB |
| 実行使用メモリ | 24,348 KB |
| 最終ジャッジ日時 | 2024-06-22 05:41:31 |
| 合計ジャッジ時間 | 6,646 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 4 WA * 23 |
ソースコード
import std.stdio, std.string, std.conv, std.range;
import std.algorithm, std.array, std.typecons, std.container;
import std.math, std.numeric, std.random, core.bitop;
enum inf = 1_001_001_001;
enum infl = 1_001_001_001_001_001_001L;
enum mod = 1_000_000_007L;
struct Mint {
long x;
this(long a) {
x = a % mod;
if (x < 0) x += mod;
}
this(Mint a) {
x = a.x;
}
ref Mint opAssign(long a) {
this = Mint(a);
return this;
}
ref Mint opOpAssign(string op)(Mint rhs) {
static if (op == "+") {
x += rhs.x;
if (x >= mod) x -= mod;
}
static if (op == "-") {
x -= rhs.x;
if (x < 0) x += mod;
}
static if (op == "*") {
(x *= rhs.x) %= mod;
}
static if (op == "/") {
this *= rhs.inv();
}
return this;
}
ref Mint opOpAssign(string op)(long rhs) {
static if (op == "^^") {
this = powmod(this, rhs);
return this;
}
else {
return mixin("this " ~ op ~ "= Mint(rhs)");
}
}
const Mint powmod(Mint a, long b) {
Mint res = 1, p = a;
while (b > 0) {
if (b & 1) res *= p;
p *= p;
b /= 2;
}
return res;
}
const Mint inv() {
return powmod(this, mod - 2);
}
Mint opUnary(string op)() if (s == "-") {
return Mint(-x);
}
Mint opBinary(string op, T)(const T rhs) {
return mixin("Mint(this) " ~ op ~ "= rhs");
}
Mint opBinaryRight(string op)(const long rhs) {
return mixin("Mint(rhs) " ~ op ~ "= this");
}
bool opEquals(Mint a, Mint b) {
return a.x == b.x;
}
bool opEquals(long rhs) {
long y = rhs % mod;
if (y < 0) y += mod;
return x == y;
}
string toString() {
import std.conv : to;
return x.to!string;
}
}
unittest {
long powmod(long a, long b) {
return b > 0 ? powmod(a, b / 2)^^2 % mod * a^^(b & 1) % mod : 1L;
}
auto a = Mint(2), b = Mint(3);
assert(a + b == 5);
assert(a + 5 == 7);
assert(1 + b == 4);
assert(a - b == mod - 1);
assert(a * b == 6);
assert(a / b == 2 * powmod(3, mod - 2));
assert(a^^10 == 1024);
Mint z;
assert(z == 0);
(z += 2) *= 3;
assert(z == 6);
}
void main() {
int N, M;
scan(N, M);
auto a = readln.split.to!(long[]);
auto x = new int[](M);
auto w = new long[](M);
foreach (i ; 0 .. M) {
scan(x[i], w[i]);
}
x[] -= 1;
auto ws = new long[](N);
foreach (i ; 0 .. M) {
ws[x[i]] += w[i];
}
foreach (i ; 0 .. N) {
if (a[i] <= ws[i]) {
writeln(-1);
return;
}
}
bool check(long c) {
if (c == 0) {
long wss;
foreach (i ; 0 .. M) {
wss += w[i];
}
return wss < a.reduce!min;
}
auto imsl = new long[](N + 1);
auto imsr = new long[](N + 1);
auto tei = new long[](N + 1);
foreach (j ; 0 .. M) {
auto d = w[j] / c;
auto r = min(x[j] + d + 1, N).to!int;
if (x[j] + 1 < r) {
imsl[x[j] + 1] += -c;
imsl[r] += c * (r - x[j] - 1);
}
auto l = max(0, x[j] - d).to!int;
if (x[j] - 1 >= l) {
if (l - 1 >= 0) imsr[l] += c * (x[j] - l);
imsr[x[j] - 1] += -c;
}
tei[l] += w[j];
tei[r] += -w[j];
}
foreach (i ; 1 .. N + 1) {
imsl[i] += imsl[i - 1];
tei[i] += tei[i - 1];
}
foreach (i ; 1 .. N + 1) {
imsl[i] += imsl[i - 1];
}
foreach_reverse (i ; 0 .. N) {
imsr[i] += imsr[i + 1];
}
foreach_reverse (i ; 0 .. N) {
imsr[i] += imsr[i + 1];
}
auto tot = new long[](N + 1);
foreach (i ; 0 .. N) {
tot[i] = imsl[i] + imsr[i] + tei[i];
if (tot[i] >= a[i]) {
return false;
}
}
return true;
}
long ng = -1, ok = inf;
while (abs(ok - ng) > 1) {
auto mid = (ng + ok) / 2;
(check(mid) ? ok : ng) = mid;
}
writeln(ok);
}
void scan(T...)(ref T args) {
auto line = readln.split;
foreach (ref arg; args) {
arg = line.front.to!(typeof(arg));
line.popFront;
}
assert(line.empty);
}
void fillAll(R, T)(ref R arr, T value) {
static if (is(typeof(arr[] = value))) {
arr[] = value;
}
else {
foreach (ref e; arr) {
fillAll(e, value);
}
}
}
bool chmin(T, U...)(ref T x, U args) {
bool isChanged;
foreach (arg; args) if (x > arg) {
x = arg;
isChanged = true;
}
return isChanged;
}
bool chmax(T, U...)(ref T x, U args) {
bool isChanged;
foreach (arg; args) if (x < arg) {
x = arg;
isChanged = true;
}
return isChanged;
}
void yes(bool ok, string y = "Yes", string n = "No") {
return writeln(ok ? y : n);
}