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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. void solve(){
  5.     int hp, n, m; cin >> hp >> n >> m;
  6.     int a[n][m], dp[n][m];
  7.     for(int i = 0; i < n; i++){
  8.         for(int j = 0; j < m; j++){
  9.             cin >> a[i][j];
  10.             dp[i][j] = 0;
  11.         }
  12.     } dp[0][0] = hp + a[0][0];
  13.     for(int i = 0; i < n; i++){
  14.         for(int j = 0; j < m; j++){
  15.             if(i == 0 && j == 0) continue;
  16.             int fromTop = (i - 1 >= 0 && dp[i - 1][j] > 0) ? dp[i - 1][j] + a[i][j] : -1;
  17.             int fromLeft = (j - 1 >= 0 && dp[i][j - 1] > 0) ? dp[i][j - 1] + a[i][j] : -1;
  18.             dp[i][j] = max(fromTop, fromLeft);
  19.             if(dp[i][j] <= 0) dp[i][j] = -1;
  20.         } 
  21.     } cout << max(-1, dp[n - 1][m - 1]) << "\n";
  22. }
  23.  
  24. int main(){
  25.     ios_base::sync_with_stdio(false);
  26.     cin.tie(NULL); cout.tie(NULL);
  27.  
  28.     solve();
  29. }
Success #stdin #stdout 0.01s 5324KB
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https://ideone.com/x68p8x
language:
C++14 (gcc 8.3)
created:
3 days ago
visibility:
public

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