Submission #1072063

#TimeUsernameProblemLanguageResultExecution timeMemory
1072063MihailoSoccer Stadium (IOI23_soccer)C++17
0 / 100
0 ms348 KiB
#include <bits/stdc++.h> #define mp make_pair #define pb push_back #define pll pair<long long, long long> #define MOD 1000002022ll #define xx first #define yy second using namespace std; typedef long long ll; pair<int, int> gore[3000][3000], dole[3000][3000], levo[3000][3000], deso[3000][3000]; int n; int stadsize(int x, int y) { if(gore[x][y]==mp(x, y)) return 0; int maxgore=gore[x][y].yy; int mindole=dole[x][y].yy; int rez=0; for(int i=0; true; i++) { if(x+i>n||gore[x+i][y]==mp(x+i, y)) break; maxgore=min(maxgore, gore[x+i][y].yy); mindole=max(mindole, dole[x+i][y].yy); rez+=maxgore-mindole-1; } maxgore=gore[x][y].yy; mindole=dole[x][y].yy; for(int i=-1; true; i--) { if(x+i<1||gore[x+i][y]==mp(x+i, y)) break; maxgore=min(maxgore, gore[x+i][y].yy); mindole=max(mindole, dole[x+i][y].yy); rez+=maxgore-mindole-1; } return rez; } int biggest_stadium(int N, std::vector<std::vector<int>> F) { { for(int i=1; i<=N; i++) { if(F[i-1][0]) gore[i][1]=mp(i, 1); else gore[i][1]=mp(i, 0); } for(int i=2; i<=N; i++) { for(int j=1; j<=N; j++) { if(F[j-1][i-1]) gore[j][i]=mp(j, i); else gore[j][i]=gore[j][i-1]; } } for(int i=1; i<=N; i++) { if(F[i-1][N-1]) dole[i][N]=mp(i, N); else dole[i][N]=mp(i, N+1); } for(int i=N-1; i>1; i--) { for(int j=1; j<=N; j++) { if(F[j-1][i-1]) dole[j][i]=mp(j, i); else dole[j][i]=dole[j][i+1]; } } for(int i=1; i<=N; i++) { if(F[0][i-1]) levo[1][i]=mp(1, i); else levo[1][i]=mp(0, i); } for(int i=2; i<=N; i++) { for(int j=1; j<=N; j++) { if(F[i-1][j-1]) levo[i][j]=mp(i, j); else levo[i][j]=levo[i-1][j]; } } for(int i=1; i<=N; i++) { if(F[N-1][i-1]) deso[N][i]=mp(N, i); else deso[N][i]=mp(N+1, i); } for(int i=N-1; i>1; i--) { for(int j=1; j<=N; j++) { if(F[i-1][j-1]) deso[i][j]=mp(i, j); else deso[i][j]=deso[i+1][j]; } } } n=N; int sol=0; for(int i=1; i<=n; i++) { for(int j=1; j<=n; j++) sol=max(sol, stadsize(i, j)); } return sol; }
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