Revise paste Untitled

#include <bits/stdc++.h>  
  
using namespace std;  
  
int main()  
{  
    int n, m, a[50][50], dp[50][50] = {};  
    cin >> n >> m;  
    for (int i = 0; i < n; i++)  
        for (int j = 0; j < m; j++)  
            cin >> a[i][j];  
    dp[0][0] = a[0][0];  
    for (int i = 1; i < n; i++)  
        dp[0][i] = a[0][i] + dp[0][i-1];  
    for (int i = 1; i < m; i++)  
        dp[i][0] = a[i][0] + dp[i-1][0];  
    for (int i = 1; i < n; i++)  
        for (int j = 1; j < m; j++)  
            dp[i][j] = a[i][j] + max(dp[i-1][j], dp[i][j-1]);  
    cout << dp[n-1][m-1] << endl;  
  
    vector<pair<int, int> > result;  
  
    int i = m - 1, j = n - 1;  
    result.push_back({i+1, j+1});  
  
    while (i != 0 || j != 0) {  
  
        if (i > 0 && dp[i][j] == dp[i-1][j] + a[i][j]) {  
            i--;  
        } else {  
            j--;  
        }  
  
        result.push_back({i+1, j+1});  
    }  
  
    reverse(result.begin(), result.end());  
    for(int i=0; i<result.size(); i++){ 
    cout << result[i].first << " " << result[i].second << endl;  
    }  
  
  
    return 0;  
}