Submission #546373

#	Time	Username	Problem	Language	Result	Execution time	Memory
546373		tmn2005	Bitaro the Brave (JOI19_ho_t1)	C++17	50 / 100	670 ms	274432 KiB

joi2019_ho_t1

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

using namespace __gnu_pbds;
using namespace std;
typedef long long ll;

#define fr first
#define sc second

#define mk make_pair
#define pb push_back
#define pob pop_back
#define pf push_front
#define pof pop_front

#define int long long
#define pii pair<int,int>
#define piii pair<int,pii>

#define all(s) s.begin(), s.end()
#define allr(s) s.rbegin(), s.rend()

#define NeedForSpeed ios::sync_with_stdio(0), cin.tie(0)
#define ordered_set tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
const int N = 3003;
int n, m, k, a, b, c, d, arr[3003][3003];
multiset<int>g[N], s[N];

void solve(){
	cin>>n>>m;
	for(int i=1; i<=n; ++i){
		for(int j=1; j<=m; ++j){
			char ch;
			cin>>ch;
			if(ch == 'J')arr[i][j] = 1;
			if(ch == 'O')arr[i][j] = 2;
			if(ch == 'I')arr[i][j] = 3;
		}
	}
	for(int i=1; i<=n; i++){
		for(int j=1; j<=m; j++){
			g[i].insert(arr[i][j]); 
		}
	}
	for(int j=1; j<=m; j++){
		for(int i=1; i<=n; i++){	
			s[j].insert(arr[i][j]); 
		}
	}
	int res = 0;
	for(int i=1; i<=n; i++){
		for(int j=1; j<=m; j++){
			if(arr[i][j] == 1){
				res += (g[i].count(2) * s[j].count(3));
			}
			else if(arr[i][j] == 2){
				g[i].erase(g[i].find(2));
			}
			else{
				s[j].erase(s[j].find(3));
			}
		}
	}
	cout<<res<<"\n";
}
main(){
	NeedForSpeed;
	int T = 1;
//	cin >> T;
	while(T--){
		solve();
	}
	return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp:68:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   68 | main(){
      | ^~~~

• Subtask 1: 20 / 20
• Subtask 2: 30 / 30
• Subtask 3: 0 / 50