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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3.  
  4. int main() {
  5. 	int n, m;
  6.     cin >> n >> m;
  7.  
  8.     int dist[1005];   // max n = 1000
  9.     int cnt = 0;
  10.  
  11.     for (int i = 0; i < n; i++) {
  12.         string row;
  13.         cin >> row;
  14.  
  15.         int g = -1, s = -1;
  16.         for (int j = 0; j < m; j++) {
  17.             if (row[j] == 'G') g = j;
  18.             if (row[j] == 'S') s = j;
  19.         }
  20.  
  21.         // Impossible case
  22.         if (g > s) {
  23.             cout << -1 << "\n";
  24.             return 0;
  25.         }
  26.  
  27.         int d = s - g;
  28.         if (d > 0)
  29.             dist[cnt++] = d;
  30.     }
  31.  
  32.     // Sort the array
  33.     sort(dist, dist + cnt);
  34.  
  35.     // Count distinct distances
  36.     int moves = 0;
  37.     for (int i = 0; i < cnt; i++) {
  38.         if (i == 0 || dist[i] != dist[i - 1])
  39.             moves++;
  40.     }
  41.  
  42.     cout << moves << "\n";
  43. 	return 0;
  44. }
Success #stdin #stdout 0.01s 5284KB
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https://ideone.com/tNuAyo
language:
C++ (gcc 8.3)
created:
3 days ago
visibility:
public

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