#include <bits/stdc++.h> using namespace std; int main(){ int n,m; scanf("%d%d",&n,&m); char grid[n][m]; for (int i = 0; i < n; i++){ for (int j = 0; j < m; j++){ scanf(" %c",&grid[i][j]); } } int ct1[n][m]; for (int j = 0; j < m; j++){ ct1[n-1][j] = (grid[n-1][j]=='I'); for (int i = n-2; i >= 0; i--){ ct1[i][j] = ct1[i+1][j] + (grid[i][j]=='I'); } } int ct2[n][m]; for (int i = 0; i < n; i++){ ct2[i][m-1] = (grid[i][m-1]=='O'); for (int j = m-2; j >= 0; j--){ ct2[i][j] = ct2[i][j+1] + (grid[i][j]=='O'); } } int ans = 0; for (int i = 0; i < n; i++){ for (int j = 0; j < m; j++){ if (grid[i][j] == 'J') { ans += ct1[i][j]*ct2[i][j]; } } } printf("%d ",ans); }

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:5:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&m);
     ~~~~~^~~~~~~~~~~~~~
joi2019_ho_t1.cpp:9:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf(" %c",&grid[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~~~~