제출 #146846

#제출 시각아이디문제언어결과실행 시간메모리
146846abacabaPaint By Numbers (IOI16_paint)C++14
컴파일 에러
0 ms0 KiB
const int N = 2e5 + 15; const int K = 1e2 + 15; int n, k, p[2][N], a[K], pref[2][N], dp[N][K]; int rec(int pos, int block) { if(block == k) return dp[pos][block] = 1; if(dp[pos][block]) return dp[pos][block]; dp[pos][block] = 2; for(int i = pos + a[block] + 1; i + a[block + 1] - 1 <= n; ++i) if(p[0][i + a[block+1] - 1] - p[0][i-1] == 0){ if(p[1][i-1] - p[1][pos + a[block] - 1] == 0) { if(rec(i, block + 1) == 1) { return dp[pos][block] = 1; } } } return dp[pos][block]; } string solve_puzzle(string s, vector<int> c) { string ans = ""; n = s.size(); k = c.size(); s = '#' + s; for(int i = 1; i <= n; ++i) p[0][i] = p[0][i-1] + (s[i] == '_'), p[1][i] = p[1][i-1] + (s[i] == 'X'); for(int i = 0; i < k; ++i) a[i+1] = c[i]; for(int i = 1; i <= n; ++i) if(!p[1][i-1] && i + a[1] - 1 <= n && p[0][i + a[1] - 1] - p[0][i - 1] == 0) rec(i, 1); for(int i = 1; i <= n; ++i) { for(int j = 1; j <= k; ++j) { if(dp[i][j] == 1) { if(j == 1) ++pref[0][1], --pref[0][i]; if(j == k) ++pref[0][a[j] + i]; ++pref[1][i]; --pref[1][a[j] + i]; ++pref[0][i - 1]; --pref[0][i]; ++pref[0][a[j] + i]; --pref[0][a[j] + i + 1]; } } } for(int i = 1; i <= n; ++i) for(int j = 0; j < 2; ++j) pref[j][i] += pref[j][i-1]; for(int i = 1; i <= n; ++i) { if(pref[1][i] && pref[0][i]) ans += '?'; else if(pref[1][i]) ans += 'X'; else ans += '_'; } return ans; }

컴파일 시 표준 에러 (stderr) 메시지

paint.cpp:22:1: error: 'string' does not name a type; did you mean 'struct'?
 string solve_puzzle(string s, vector<int> c) {
 ^~~~~~
 struct