제출 #1175452

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1175452		TrendBattles	Snake Escaping (JOI18_snake_escaping)	C++17	12 / 100	141 ms	131072 KiB

snake_escaping

#include <bits/stdc++.h>
using namespace std;
using lli = long long int;

#define INFILE "main.inp"
#define OUTFILE "main.out"


namespace SUBTASK_small_L {
    void main(int L, int Q, string digits) {
        vector <int> pow_3(L);
        pow_3[0] = 1;
        for (int i = 1; i < L; ++i) {
            pow_3[i] = pow_3[i - 1] * 3;
        }

        const int M = pow_3[L];
        vector <int> mask_3(1 << L);
        vector <int> finale(M);

        for (int m = 1; m < (1 << L); ++m) {
            int p = m & -m;

            mask_3[m] = mask_3[m ^ p] + pow_3[__builtin_ctz(p)];
        }

        for (int m = 0; m < (1 << L); ++m) {
            int x = digits[m] - '0';

            for (int p = 0; p < (1 << L); ++p) {
                int f_m = mask_3[p] * 2 + mask_3[m & ~p];

                finale[f_m] += x;
            }
        }

        for (int _ = 0; _ < Q; ++_) {
            string que; cin >> que;
            int m = 0;
            for (int i = 0; i < L; ++i) {
                if (que[i] == '1') m += pow_3[L - i - 1];
                else if (que[i] == '?') m += pow_3[L - i - 1] * 2;
            }
            cout << finale[m] << '\n';
        }
    }
}
int main() {
    ios::sync_with_stdio(0); cin.tie(0);
    if (fopen(INFILE, "r")) {
        freopen(INFILE, "r", stdin);
        freopen(OUTFILE, "w", stdout);
    }

    int L, Q; cin >> L >> Q;
    string digits; cin >> digits;

    if (L <= 13) {
        SUBTASK_small_L::main(L, Q, digits);
        return 0;
    }
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:51:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   51 |         freopen(INFILE, "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:52:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   52 |         freopen(OUTFILE, "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 0 / 10
• Subtask 4: 0 / 53
• Subtask 5: 0 / 25