oj.uz

Submission #62387

# Submission time Handle Problem Language Result Execution time Memory
62387 2018-07-28T09:25:47 Z win11905 Mate (COCI18_mate) C++11
100 / 100
 789 ms 119032 KB 
#include <bits/stdc++.h>
using namespace std;

#define pii pair<int, int>
#define x first
#define y second

const int N = 2e3+5;
const int M = 1e9+7;

int n, m, ret[26], c[N][N], ans[N][26][26];
char A[N];
vector<pii> alp[N][N];

int main() {
    scanf("%s", A), n = strlen(A);
    for_each(A, A+n, [&](char &c) { c -= 'a'; });
    c[0][0] = 1;
    for(int i = 1; i <= n; ++i) {
        c[i][0] = 1;
        for(int j = 1; j <= i; ++j) c[i][j] = (c[i-1][j] + c[i-1][j-1]) % M;
    }
    for(int len = 2; len <= n; ++len) {
        memset(ret, 0, sizeof ret);
        for(int i = n-2; ~i; --i) {
            ret[A[i+1]]++;
            for(int j = 0; j < 26; ++j) 
                ans[len][A[i]][j] = (1ll * c[i][len-2] * ret[j] + ans[len][A[i]][j]) % M;
        }
    }
    scanf("%d", &m);
    while(m--) {
        int d; scanf("%d %s", &d, A);
        printf("%d\n", ans[d][A[0]-'a'][A[1]-'a']);
    }
}

Compilation message

mate.cpp: In function 'int main()':
mate.cpp:26:23: warning: array subscript has type 'char' [-Wchar-subscripts]
             ret[A[i+1]]++;
                       ^
mate.cpp:28:30: warning: array subscript has type 'char' [-Wchar-subscripts]
                 ans[len][A[i]][j] = (1ll * c[i][len-2] * ret[j] + ans[len][A[i]][j]) % M;
                              ^
mate.cpp:28:80: warning: array subscript has type 'char' [-Wchar-subscripts]
                 ans[len][A[i]][j] = (1ll * c[i][len-2] * ret[j] + ans[len][A[i]][j]) % M;
                                                                                ^
mate.cpp:16:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%s", A), n = strlen(A);
     ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~
mate.cpp:31:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &m);
     ~~~~~^~~~~~~~~~
mate.cpp:33:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         int d; scanf("%d %s", &d, A);
                ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 97 ms 95096 KB Output is correct
2 Correct 95 ms 95116 KB Output is correct
3 Correct 96 ms 95300 KB Output is correct
4 Correct 104 ms 95304 KB Output is correct
5 Correct 139 ms 97160 KB Output is correct
6 Correct 160 ms 97476 KB Output is correct
7 Correct 147 ms 97476 KB Output is correct
8 Correct 138 ms 97476 KB Output is correct
9 Correct 783 ms 119032 KB Output is correct
10 Correct 789 ms 119032 KB Output is correct