Submission #118721

#TimeUsernameProblemLanguageResultExecution timeMemory
118721sofhiasouzaMaja (COCI18_maja)C++14
99 / 110
967 ms896 KiB
#include <bits/stdc++.h> using namespace std; typedef long long int ll; const int maxn = 110, maxs = 1e4+10; ll n, m, a, b, mat[maxn][maxn], k; struct pt { ll f; ll sf; bool operator > (const pt &k) const{ if(f != k.f) return f > k.f; return sf > k.sf; } }dp[maxn][maxn][2]; pt solve() { int mod = 0; for(int t = 1 ; t <= min(k, (ll)10000) ; t++) { mod ^= 1; for(int i = 1 ; i <= n ; i++) { for(int j = 1 ; j <= m ; j++) { if(dp[i-1][j][mod^1] > dp[i+1][j][mod^1] and dp[i-1][j][mod^1] > dp[i][j-1][mod^1] and dp[i-1][j][mod^1] > dp[i][j+1][mod^1]) { dp[i][j][mod] = dp[i-1][j][mod^1]; if(mat[i][j]+mat[i-1][j] > dp[i-1][j][mod^1].sf) dp[i][j][mod].sf = mat[i][j]+mat[i-1][j]; } else if(dp[i+1][j][mod^1] > dp[i-1][j][mod^1] and dp[i+1][j][mod^1] > dp[i][j-1][mod^1] and dp[i+1][j][mod^1] > dp[i][j+1][mod^1]) { dp[i][j][mod] = dp[i+1][j][mod^1]; if(mat[i][j]+mat[i+1][j] > dp[i+1][j][mod^1].sf) dp[i][j][mod].sf = mat[i][j]+mat[i+1][j]; } else if(dp[i][j-1][mod^1] > dp[i-1][j][mod^1] and dp[i][j-1][mod^1] > dp[i+1][j][mod^1] and dp[i][j-1][mod^1] > dp[i][j+1][mod^1]) { dp[i][j][mod] = dp[i][j-1][mod^1]; if(mat[i][j]+mat[i][j-1] > dp[i][j-1][mod^1].sf) dp[i][j][mod].sf = mat[i][j]+mat[i][j-1]; } else { dp[i][j][mod] = dp[i][j+1][mod^1]; if(mat[i][j]+mat[i][j+1] > dp[i][j+1][mod^1].sf) dp[i][j][mod].sf = mat[i][j]+mat[i][j+1]; } if(dp[i][j][mod].f != -1) dp[i][j][mod].f += mat[i][j]; } } } return dp[a][b][mod]; } int main() { cin >> n >> m >> a >> b >> k; for(int i = 1 ; i <= n ; i++) { for(int j = 1 ; j <= m ; j++) { cin >> mat[i][j]; } } memset(dp, -1, sizeof dp); dp[a][b][0].f = 0; pt resp = solve(); if(k <= 10000) cout << resp.f << endl; else cout << (ll)resp.f + (ll)(resp.sf)*((ll)k-10000)/2 << endl; }
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