結果
| 問題 |
No.3244 Range Multiple of 8 Query
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-08-23 11:55:31 |
| 言語 | C++23 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 2,995 ms / 5,000 ms |
| コード長 | 4,487 bytes |
| コンパイル時間 | 3,840 ms |
| コンパイル使用メモリ | 310,584 KB |
| 実行使用メモリ | 51,972 KB |
| 最終ジャッジ日時 | 2025-08-23 11:56:25 |
| 合計ジャッジ時間 | 53,541 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 40 |
ソースコード
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>
using namespace std;
template <class F> class y_combinator {
F f;
public:
y_combinator(F&& f) : f(std::forward<F>(f)) {}
template <class... Args> auto operator()(Args&&... args) const { return f(*this, std::forward<Args>(args)...); }
};
using ll = long long;
using ld = long double;
using u8 = uint8_t;
using u32 = uint32_t;
using u64 = uint64_t;
using vi = vector<int>;
using vl = vector<ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
template <class T, class U = std::less<T>> using prique = std::priority_queue<T, std::vector<T>, U>;
inline constexpr int popcnt(u64 x) noexcept { return __builtin_popcountll(x); }
template <class T> T floor(T a, T b) noexcept { return a / b - (a % b && (a ^ b) < 0); }
template <class T> T ceil(T a, T b) noexcept { return floor(a + b - 1, b); }
template <class T> bool chmin(T& x, const T& y) noexcept { return (x > y ? x = y, true : false); }
template <class T> bool chmax(T& x, const T& y) noexcept { return (x < y ? x = y, true : false); }
void SCAN() {}
template <class H, class... T> void SCAN(H& h, T&... t) { std::cin >> h, SCAN(t...); }
#define INT(...) \
int __VA_ARGS__; \
SCAN(__VA_ARGS__)
#define LL(...) \
long long __VA_ARGS__; \
SCAN(__VA_ARGS__)
#define LD(...) \
long double __VA_ARGS__; \
SCAN(__VA_ARGS__)
#define STR(...) \
std::string __VA_ARGS__; \
SCAN(__VA_ARGS__)
#define CHAR(...) \
char __VA_ARGS__; \
SCAN(__VA_ARGS__)
#define VEC(type, name, size) \
std::vector<type> name(size); \
for (int i = 0; i < (int)size; i++) SCAN(name[i]);
#define VV(type, name, h, w) \
std::vector<std::vector<type>> name(h, std::vector<type>(w)); \
for (int i = 0; i < (int)h; i++) \
for (int j = 0; j < (int)w; j++) SCAN(name[i][j]);
#define overload4(a, b, c, d, e, ...) e
#define rep1(a) for (long long _i = 0; _i < (a); _i++)
#define rep2(i, a) for (long long i = 0; i < (a); i++)
#define rep3(i, a, b) for (long long i = (a); i < (b); i++)
#define rep4(i, a, b, c) for (long long i = (a); i < (b); i += (c))
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define rrep(i, a, b, c) for (long long i = (a); i > (b); i += (c))
#define all(x) std::begin(x), std::end(x)
#define rall(x) std::rbegin(x), std::rend(x)
#define len(x) (long long)(size(x))
#define pb push_back
#ifndef LOCAL
#define debug(...)
#endif
int precalc[3 << 17][10][3];
inline int inv(int a, int b, int c) {
return (a > b) + (a > c) + (b > c);
}
void run_case() {
INT(N, Q);
STR(S);
vector<vector<int>> idx(10);
memset(precalc, -1, sizeof(precalc));
rep(i, N) {
rep(j, 10) rep(k, 3) precalc[i + 1][j][k] = precalc[i][j][k];
int d = S[i] - '0';
idx[d].pb(i);
rep(k, min<int>(3, len(idx[d]))) {
precalc[i + 1][d][k] = idx[d][len(idx[d]) - k - 1];
}
}
vi cand;
rep(x, 0, 1000, 8) if (x >= 100 && to_string(x).find('0') == string::npos) cand.push_back(x);
auto f = [&](int l, int r, int tar) -> int {
vi vis(10);
vi ids;
while (tar) {
int d = tar % 10;
tar /= 10;
int idx = precalc[r][d][vis[d]];
if (idx < l) return 1e9;
ids.push_back(idx);
vis[d]++;
}
reverse(all(ids));
int ans = 3 * r - 6;
assert(len(ids) == 3);
ans -= ids[0] + ids[1] + ids[2];
ans += inv(ids[0], ids[1], ids[2]);
return ans;
};
rep(Q) {
INT(l, r);
l--;
if (r - l == 1) {
cout << (S[l] == '8' ? 0 : -1) << "\n";
} else if (r - l == 2) {
int d1 = S[l] - '0', d2 = S[l + 1] - '0';
int s = d1 * 10 + d2;
int t = d2 * 10 + d1;
if (s % 8 == 0) cout << 0 << "\n";
else if (t % 8 == 0) cout << 1 << "\n";
else cout << -1 << "\n";
} else {
int ans = 1e9;
for (int x : cand) {
chmin(ans, f(l, r, x));
}
cout << (ans == 1e9 ? -1 : ans) << "\n";
}
}
}
int main() {
std::ios_base::sync_with_stdio(false);
std::cin.tie(nullptr);
std::fixed(std::cout).precision(16);
int T = 1;
while (T--) run_case();
return 0;
}