Submission #892498

#	Time	Username	Problem	Language	Result	Execution time	Memory
892498		raul2008487	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	203 ms	159060 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
#define ll long long
#define pb push_back
#define eb emplace_back
#define vl vector<ll>
#define fi first
#define se second
#define in insert
#define mpr make_pair
#define lg(x) __lg(x)
#define bpc(x) __builtin_popcount(x)
#define all(v) v.begin(), v.end()
#define endl "\n"
using namespace std;
const int sz = 2e5+5;
const int mod = 998244353;
const ll inf = 1000000000000000;
void solve()
{
    ll n, m, i, j;
    cin>>n>>m;
    char a[n+1][m+1];
    ll sc[n+2][m+2], sr[n+2][m+2];
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            cin>>a[i][j];
        }
    }
    for(i=1;i<=n;i++){sr[i][m+1] = 0;}
    for(i=1;i<=m;i++){sc[n+1][i] = 0;}
    ll ans = 0;
    for(i=n;i>0;i--){
        for(j=m;j>0;j--){
            sr[i][j] = sr[i][j+1];
            sc[i][j] = sc[i+1][j];
            if(a[i][j] == 'O'){sr[i][j]++;}
            else if(a[i][j] == 'I'){sc[i][j]++;}
            else{
                ans += (sr[i][j] * sc[i][j]);
            }
        }
    }
    /*for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            cout << sr[i][j] << ' ';
        }
        cout << endl;
    }*/
    cout << ans << endl;
}
int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    //precomp();
    ll tst=1;
    //cin>>tst;
    while(tst--){
        solve();
    }
}
/*
1
3 2
2 2 2
1 6
1 5
*/

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