Submission #1027786

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027786		Issa	Tiles (BOI24_tiles)	C++17	0 / 100	22 ms	9352 KiB

Main

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define ent "\n"

const int maxn = 1e6 + 100;
const ll INF = (ll)1e18 + 100;
const int inf = 1e9 + 100;
const int MOD = 1e9 + 123;
const int maxl = 26;
const int P = 31;

int n, m;
int a[maxn];
int b[maxn];

void test(){
	cin >> n >> m;
	for(int i = 1; i <= n; i++){
		cin >> a[i] >> b[i];
	}
	vector<int> v;
	for(int i = 2; i <= n; i++){
		while(v.size() > 1){
			int k = v[v.size()-2], j = v.back();
			if(a[k] == a[j] && a[j] == a[i]) v.pop_back();
			else if(b[k] == b[j] && b[j] == b[i]) v.pop_back();
			else break;
		} v.push_back(i);
	}
	int ans = 0;
	for(int i: v){
		if(b[i] & 1) break;
		ans = a[i] - (a[i] & 1);
		if(a[i] & 1) break;
	}
	cout << ans;
}

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int t; t = 1;
    while(t--) test();
    cout << ent;
}

• Subtask 1: 0 / 4
• Subtask 2: 0 / 9
• Subtask 3: 0 / 11
• Subtask 4: 0 / 19
• Subtask 5: 0 / 22
• Subtask 6: 0 / 25
• Subtask 7: 0 / 10