제출 #98771

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
98771		bogdan10bos	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	83 ms	18040 KiB

joi2019_ho_t1

#include <bits/stdc++.h>

using namespace std;

//#define FILE_IO

int N, M;
int dwn[3005], rgt[3005];
char a[3005][3005];

int main()
{
    #ifdef FILE_IO
    freopen("1.in", "r", stdin);
    //freopen("1.out", "w", stdout);
    #endif

    scanf("%d%d\n", &N, &M);
    for(int i = 1; i <= N; i++)
        scanf("%s\n", a[i] + 1);

    long long ans = 0;
    for(int i = N; i >= 1; i--)
        for(int j = M; j >= 1; j--)
        {
            rgt[j] = rgt[j + 1] + (a[i][j] == 'O');
            dwn[j] += (a[i][j] == 'I');
            if(a[i][j] == 'J')
                ans += 1LL * rgt[j] * dwn[j];
        }

    cout << ans;

    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d\n", &N, &M);
     ~~~~~^~~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:20:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%s\n", a[i] + 1);
         ~~~~~^~~~~~~~~~~~~~~~~~

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