Submission #963367

#	Time	Username	Problem	Language	Result	Execution time	Memory
963367		leo_2727	Bitaro the Brave (JOI19_ho_t1)	C++17	100 / 100	208 ms	88796 KiB

joi2019_ho_t1

#include <algorithm>
#include <fstream>
#include <vector>
#include <queue>
#include <stack>
#include <iostream>
#include <cmath>
#include <queue>
#include <set>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <iomanip>
#define F first
#define S second
#define PB push_back
using namespace std;
const long long MOD=1e9+7, INF=1e18;
const int INFI=1e9;
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ii> vii;
typedef vector<pair<int, ii>> viii;
typedef vector<vii> vvii;
typedef vector<ll> vll;
typedef vector<vll> vvll;

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int h, w;   cin>>h>>w;
    vector<vector<char>> grid(h+1, vector<char>(w+1));
    vvi prefRow(h+1, vi(w+1, 0)), prefCol(h+1, vi(w+1, 0));
    for(int i=1;i<=h;i++)
        for(int j=1;j<=w;j++)
            cin>>grid[i][j];
    for(int i=1;i<=h;i++)
        for(int j=1;j<=w;j++){
            prefRow[i][j]=prefRow[i][j-1];
            prefCol[i][j]=prefCol[i-1][j];
            if(grid[i][j]=='O') prefRow[i][j]++;
            if(grid[i][j]=='I') prefCol[i][j]++;
        }
    ll ans=0;
    for(int i=1;i<=h;i++)
        for(int j=1;j<=w;j++)
            if(grid[i][j]=='J')
                ans+=(prefRow[i][w]-prefRow[i][j])*(prefCol[h][j]-prefCol[i][j]);
    cout<<ans<<"\n";
    return 0;
}

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