제출 #1185071

#제출 시각아이디문제언어결과실행 시간메모리
1185071SmuggingSpunKamenčići (COCI21_kamencici)C++20
70 / 70
9 ms12104 KiB
#include<bits/stdc++.h> #define taskname "B" using namespace std; const int lim = 355; int n, k, pref[lim]; string s; bitset<lim>vis[lim][lim], f[lim][lim]; bool dp(int l, int r, int c1){ if(c1 >= k){ return false; } if(l > r){ return true; } if(pref[l - 1] + pref[n] - pref[r] - c1 >= k){ return true; } if(l == r){ return false; } if(vis[l][r].test(c1)){ return f[l][r].test(c1); } vis[l][r].set(c1); if((dp(l + 2, r, c1 + int(s[l] == 'C')) && dp(l + 1, r - 1, c1 + int(s[l] == 'C'))) || (dp(l, r - 2, c1 + int(s[r] == 'C')) && dp(l + 1, r - 1, c1 + int(s[r] == 'C')))){ f[l][r].set(c1); } return f[l][r].test(c1); } int main(){ ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); if(fopen(taskname".inp", "r")){ freopen(taskname".inp", "r", stdin); } for(int i = 0; i < lim; i++){ for(int j = 0; j < lim; j++){ vis[i][j].reset(); f[i][j].reset(); } } cin >> n >> k >> s; s = '#' + s; pref[0] = 0; for(int i = 1; i <= n; i++){ pref[i] = pref[i - 1] + int(s[i] == 'C'); } cout << (dp(1, n, 0) ? "DA" : "NE"); }

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:33:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   33 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~
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