/in/foo.cc: In function 'int dp(int, int)':
/in/foo.cc:32:14: error: 'INF' was not declared in this scope
     int minv=INF,w=0;
              ^~~
/in/foo.cc:34:30: error: 'sum' was not declared in this scope
         if(dp(x,k)+dp(k+1,y)+sum[x][y]<=minv) {
                              ^~~
/in/foo.cc:36:13: error: 'w' was not declared in this scope
             w=k;
             ^
/in/foo.cc:39:13: error: 'w' was not declared in this scope
     g[x][y]=w;
             ^
/in/foo.cc: In function 'int main()':
/in/foo.cc:71:8: error: 'DP' was not declared in this scope
     DP();
        ^