제출 #135184

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
135184		duality	Snake Escaping (JOI18_snake_escaping)	C++11	58 / 100	2047 ms	22108 KiB

snake_escaping

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long int LLI;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef vector<pii> vpii;

int H = 10;
char S[(1 << 20)+1],T[21];
struct query { int m1,m2,i; };
query queries[1000000];
int pow3[21];
int ans[1000000];
int num[1594323];
int sum[1594323];
int main() {
    int i,j;
    int L,Q;
    scanf("%d %d %s",&L,&Q,S);
    H = min(H,L);
    for (i = 0; i < Q; i++) {
        scanf("%s",T),queries[i].i = i;
        reverse(T,T+H),reverse(T+H,T+L);
        for (j = 0; j < H; j++) {
            if (T[j] == '0') queries[i].m1 |= (1 << (2*j));
            else if (T[j] == '1') queries[i].m1 |= (1 << (2*j+1));
            else queries[i].m1 |= (1 << (2*j)) | (1 << (2*j+1));
        }
        int p = 1;
        for (j = H; j < L; j++) {
            if (T[j] == '1') queries[i].m2 += p;
            else if (T[j] == '?') queries[i].m2 += 2*p;
            p *= 3;
        }
    }

    int k;
    pow3[0] = 1;
    for (i = 1; i <= L; i++) pow3[i] = pow3[i-1]*3;
    for (i = 0; i < pow3[L-H]; i++) {
        int n = i;
        for (j = 0; j < L-H; j++) {
            if ((n % 3) == 2) num[i] |= (1 << j);
            n /= 3;
        }
    }
    for (i = 0; i < (1 << H); i++) {
        for (j = 0; j < (1 << (L-H)); j++) {
            int c = 0;
            for (k = 0; k < L-H; k++) {
                if (j & (1 << k)) c += pow3[k];
            }
            sum[c] = S[j+i*(1 << (L-H))]-'0';
        }
        for (j = 0; j < L-H; j++) {
            for (k = 0; k < pow3[L-H]; k++) {
                if (num[k] & (1 << j)) sum[k] = sum[k-pow3[j]]+sum[k-2*pow3[j]];
            }
        }
        int m = 0;
        for (j = 0; j < H; j++) {
            if (i & (1 << j)) m |= (1 << (2*j+1));
            else m |= (1 << (2*j));
        }
        for (j = 0; j < Q; j++) {
            if ((queries[j].m1 & m) == m) ans[queries[j].i] += sum[queries[j].m2];
        }
    }
    for (i = 0; i < Q; i++) printf("%d\n",ans[i]);

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

snake_escaping.cpp: In function 'int main()':
snake_escaping.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d %s",&L,&Q,S);
     ~~~~~^~~~~~~~~~~~~~~~~~~~
snake_escaping.cpp:24:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s",T),queries[i].i = i;
         ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~

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