제출 #314946

#제출 시각아이디문제언어결과실행 시간메모리
314946nafis_shifatPaint By Numbers (IOI16_paint)C++14
100 / 100
218 ms83824 KiB
#include "paint.h" #include<bits/stdc++.h> #define ll long long #define pii pair<int,int> using namespace std; const int mxn=2e5+5; const int mxk=103; const int inf=1e9; bool dp1[mxn][mxk][2] = {} ,dp2[mxn][mxk][2] = {}; string solve_puzzle(string s, vector<int> c) { int n = s.size(); int k = c.size(); s = '#' + s; c.insert(c.begin(),0); int lw = 0; dp1[0][0][0] = true; dp2[n+1][k+1][0] = true; for(int i = 1 ; i <= n; i++) { if(s[i] != 'X') { dp1[i][0][0] = dp1[i-1][0][0]; for(int j = 1; j <=k; j++) { dp1[i][j][0] = dp1[i-1][j][0] || ((lw <= i - c[j] - 1) && dp1[i - c[j] - 1][j - 1][0]); } } if(s[i] != '_') { for(int j = 1; j <= k; j++) { dp1[i][j][1] = (i - c[j] >= lw) && dp1[i - c[j]][j - 1][0]; } } else { lw = i; } } int rw = n + 1; for(int i = n ; i >= 1; i--) { if(s[i] != 'X') { dp2[i][k+1][0] = dp2[i+1][k+1][0]; for(int j = 1; j <=k; j++) { dp2[i][j][0] = dp2[i+1][j][0] || ((rw >= i + c[j] + 1) && dp2[i + c[j] + 1][j + 1][0]); } } if(s[i] != '_') { for(int j = 1; j <= k; j++) { dp2[i][j][1] = (i + c[j] <= rw) && dp2[i + c[j]][j + 1][0]; } } else { rw = i; } } //cout<<dp2[11][3][0]<<" --- "<<dp1[10][2][0]<<endl; int t1[n+1] = {}; int t2[n+1] = {}; for(int i = 1; i <= n; i++) { int mx = -1; for(int j = 1; j <= k; j++) { if(dp1[i][j][0] && (dp2[i][j+1][0] || dp2[i+1][j+1][1])) t1[i] = 1; if(dp1[i][j][1] && dp2[i+1][j+1][0]) mx = max(mx,c[j]); } if(dp1[i][0][0] && (dp2[i+1][1][0] || dp2[i+1][1][1])) t1[i] = 1; for(int j = i; j > i - mx; j--) t2[j] = 1; } string res = ""; for(int i = 1; i <= n; i++) { if(t1[i] && t2[i]) res+='?'; else if(t1[i]) res+='_'; else res+='X'; } return res; }
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