Submission #160484

#	Time	Username	Problem	Language	Result	Execution time	Memory
160484		kingfran1907	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	168 ms	53372 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;
typedef long long llint;
const int maxn = 3010;

int n, m;
char niz[maxn][maxn];
int pref[maxn][maxn];
llint cnt[maxn];

int main() {
    scanf("%d%d", &n, &m);
    for (int i = 0; i < n; i++)
        scanf("%s", niz+i);

    llint sol = 0;
    for (int i = 0; i < n; i++) {
        for (int j = m - 1; j >= 0; j--)
            pref[i][j] = pref[i][j + 1] + (niz[i][j] == 'O');
    }

    for (int i = 0; i < n; i++) {
        for (int j = 0; j < m; j++) {
            if (niz[i][j] == 'J') cnt[j] += pref[i][j];
            else if (niz[i][j] == 'I') {
                sol += cnt[j];
                //printf("%d %d -> %d\n", i, j, cnt[j]);
            }
        }
    }
    printf("%lld\n", sol);
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:15:26: warning: format '%s' expects argument of type 'char*', but argument 2 has type 'char (*)[3010]' [-Wformat=]
         scanf("%s", niz+i);
                     ~~~~~^
joi2019_ho_t1.cpp:13:10: 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:15:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s", niz+i);
         ~~~~~^~~~~~~~~~~~~

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