Submission #1212854

#	Time	Username	Problem	Language	Result	Execution time	Memory
1212854		nvc2k8	Bitaro the Brave (JOI19_ho_t1)	C++20	100 / 100	255 ms	150380 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
#define TASK "askdjaskdj"
#define INT_LIM (int) 2147483647
#define LL_LIM (long long) 9223372036854775807
#define endl '\n'
#define mp make_pair
#define pb push_back
#define fi first
#define se second
#define BIT(i,x) (((i)>>(x))&1)
#define FOR(i,a,b) for(int i = (a); i<=(b); i++)
#define FORD(i,a,b) for(int i = (a); i>=(b); i--)
#define ll long long
#define pii pair<int,int>
using namespace std;
///------------------------------------------///
int n,m;
char a[3005][3005];

void inp()
{
    cin >> n >> m;
    FOR(i, 1, n)
    {
        FOR(j, 1, m) cin >> a[i][j];
    }
}

ll ans = 0;
ll f[3005][3005], g[3005][3005];

void solve()
{
    FOR(i, 1, n)
    {
        int cnt = 0;
        FORD(j, m, 1)
        {
            if (a[i][j]=='J') f[i][j] = cnt;
            else if (a[i][j]=='O') cnt++;
        }
    }
    FOR(j, 1, m)
    {
        int cnt = 0;
        FORD(i, n, 1)
        {
            if (a[i][j]=='J') g[i][j] = cnt;
            else if (a[i][j]=='I') cnt++;
        }
    }

    FOR(i, 1, n) FOR(j, 1, m)
    {
        ans+= f[i][j]*g[i][j];
    }
    cout << ans;
}

signed main()
{
    ///--------------------------///
    ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
    if (fopen(TASK".INP","r")!=NULL)
    {
        freopen(TASK".INP","r",stdin);
        freopen(TASK".OUT","w",stdout);
    }
    ///--------------------------///

    int NTEST = 1;
    //cin >> NTEST;

    while (NTEST--)
    {
        inp();
        solve();
    }

    return 0;
}

///------------------------------------------///

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:66:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   66 |         freopen(TASK".INP","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:67:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   67 |         freopen(TASK".OUT","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

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