제출 #223292

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
223292		dantoh000	Trener (COCI20_trener)	C++14	22 / 110	18 ms	3200 KiB

trener

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int mod = 1000000007;
int n,k;
unordered_map<string,int> ct[2];
string a[55][1505];
int main(){
    scanf("%d%d",&n,&k);
    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= k; j++){
            cin >> a[i][j];
        }
    }
    ll ans = 0;
    ct[0][""]++;
    for (int i = 1; i <= n; i++){
        assert(ct[i&1].size() == 0);
        for (int j = 1; j <= k; j++){
            string X = a[i][j].substr(1);
            string Y = a[i][j].substr(0,a[i][j].size()-1);
            //cout << a[i][j] << " " << X << " " << Y;
            int res = ct[1-i&1][X];
            if (X != Y) res += ct[1-i&1][Y];
            //printf("%d %d\n",ct[X],ct[Y]);
            ct[i&1][a[i][j]] += res;
            ct[i&1][a[i][j]] %= mod;
            if (i == n) ans += res;
        }
        ct[1-i&1].clear();
    }
    printf("%lld",ans%mod);
}

컴파일 시 표준 에러 (stderr) 메시지

trener.cpp: In function 'int main()':
trener.cpp:23:27: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
             int res = ct[1-i&1][X];
                          ~^~
trener.cpp:24:36: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
             if (X != Y) res += ct[1-i&1][Y];
                                   ~^~
trener.cpp:30:13: warning: suggest parentheses around '-' in operand of '&' [-Wparentheses]
         ct[1-i&1].clear();
            ~^~
trener.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 0 / 33
• Subtask 3: 0 / 55