Submission #110425

#	Time	Username	Problem	Language	Result	Execution time	Memory
110425		said	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	436 ms	155832 KiB

joi2019_ho_t1

#include <iostream>

using namespace std;

#define int long long
#define MAX 3100

string s[MAX];
int h, w, v1[MAX][MAX], v2[MAX][MAX];

main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);

    cin >> h >> w;
    for(int i = 0; i < h; i++)
        cin >> s[i];

    int qt = 0;
    for(int j = 0; j < w; j++){
        qt = 0;
        for(int i = h-1; i >= 0; i--){
            v1[i][j] += qt;
            if(s[i][j] == 'I'){
                qt++;
            }
        }
    }

    for(int i = 0; i < h; i++){
        qt = 0;
        for(int j = w-1; j >= 0; j--){
            v2[i][j] += qt;
            if(s[i][j] == 'O'){
                qt++;
            }
        }
    }
    int ans = 0;
    for(int i = 0; i < h; i++){
        for(int j = 0; j < w; j++){
            if(s[i][j] == 'J'){
                ans += v1[i][j]*v2[i][j];
            }
        }
    }

    cout << ans << "\n";

    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp:11:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 50 / 50