Submission #369332

#	Time	Username	Problem	Language	Result	Execution time	Memory
369332		parsabahrami	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	346 ms	88700 KiB

joi2019_ho_t1

// Call my Name and Save me from The Dark
#include <bits/stdc++.h>
 
using namespace std;

typedef long long int ll;
typedef pair<int, int> pii;
 
#define SZ(x)                       (int) x.size()
#define F                           first
#define S                           second

const int N = 3e3 + 10, MOD = 1e9 + 7;
char A[N][N]; int n, m, I[N][N], O[N][N]; 

int main() {
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; i++) {
        scanf("%s", A[i] + 1);
    }
    for (int i = 1; i <= n; i++) {
        for (int j = m; j >= 1; j--) O[i][j] = O[i][j + 1] + (A[i][j] == 'O');
    }
    for (int j = 1; j <= m; j++) {
        for (int i = n; i >= 1; i--) {
            I[i][j] = I[i + 1][j] + (A[i][j] == 'I');
        }
    }
    ll ret = 0;
    for (int i = 1; i <= n; i++) 
        for (int j = 1; j <= m; j++) if (A[i][j] == 'J') ret += 1ll * O[i][j] * I[i][j];
    printf("%lld\n", ret);
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   17 |     scanf("%d%d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |         scanf("%s", A[i] + 1);
      |         ~~~~~^~~~~~~~~~~~~~~~

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