Submission #924020

#	Time	Username	Problem	Language	Result	Execution time	Memory
924020		Nurislam	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	275 ms	160056 KiB

joi2019_ho_t1

#include <bits/stdc++.h>
#include <iostream>
//~ #include <ext/pb_ds/assoc_container.hpp> 
//~ #include <ext/pb_ds/tree_policy.hpp> 


using namespace std;
//~ using namespace __gnu_pbds; 
  

#define pb push_back
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
#define int long long
//~ #define double long double 
//~ #define order_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update> 

///*                                                    __                    __                        __                    */
///*        ======     _      /| /|  __   _            /   |  |   /|  |   @  |    |  |  | /   /| |\  | /   |  |  @ | /        */
///* \-       ||  |_| |_     / |/ | |  | |_  |-        |   |--|  /-|  |   |  \ \  |==|  |-   /=| | \ | |   |--|  | |-         */
///*          ||  | | |_    /     | |__|  _| |_        \__ |  | /  |  |__ |  __|  |  |  | \ /  | |  \| \__ |  |  | | \        */
///* 

typedef vector<int> vi;
typedef vector<double> vd;
typedef pair<int,int> pii;
typedef vector<pii> vii;
//~ typedef vector<vi> vv;
const int N = 2e5+2, inf = 1e16, mod = 998244353;
void solve(){
	int h, w;
	cin >> h >> w;
	string a[h];
	for(auto &i:a)cin >> i;
	int ci[h+1][w+1]{};
	for(int i = 0; i < w; i++){
		for(int j = h-1; j >= 0; j--){
			ci[j][i] = ci[j+1][i]+(a[j][i] == 'I');
		}
	}
	int co[h+1][w+1]{};
	for(int i = 0; i < h; i++){
		for(int j = w-1; j >= 0; j--){
			co[i][j] = co[i][j+1] + (a[i][j] == 'O');
		}
	}
	int ans = 0;
	for(int i = 0; i < h; i++){
		for(int j = 0; j < w; j++){
			if(a[i][j] == 'J')ans+=(co[i][j]*ci[i][j]);
		}
	}
	
	cout << ans << '\n';
}
main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
	int test = 1;
	//~ cin >> test;
	while(test--){
		solve();
	}
}

Compilation message (stderr)

joi2019_ho_t1.cpp:58:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   58 | main(){
      | ^~~~

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