Submission #1284813

#	Time	Username	Problem	Language	Result	Execution time	Memory
1284813		SmuggingSpun	Passport (JOI23_passport)	C++20	16 / 100	7 ms	580 KiB

passport

#include<bits/stdc++.h>
#define taskname "C"
typedef long long ll;
using namespace std;
template<class T>void minimize(T& a, T b){
	if(a > b){
		a = b;
	}
}
const int INF = 1e9;
int n, q;
namespace sub2{
	void solve(){
		vector<int>L(n + 1), R(n + 1);
		for(int i = 1; i <= n; i++){
			cin >> L[i] >> R[i];
		}
		vector<vector<int>>dp(n + 1, vector<int>(n + 1, INF));
		dp[1][n] = 0;
		for(int len = n - 2; len > -1; len--){
			for(int l = 1; true; l++){
				int r = l + len;
				if(r > n){
					break;
				}
				for(int i = l; i <= r; i++){
					minimize(dp[l][r], dp[min(L[i], l)][max(R[i], r)] + 1);
				}
			}
		}
		cin >> q;
		for(int _ = 0; _ < q; _++){
			int x;
			cin >> x;
			cout << (dp[x][x] == INF ? -1 : dp[x][x]) << "\n";
		}
	}
}
namespace sub1345{
	void solve(){
		
	}
}
int main(){
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	if(fopen(taskname".inp", "r")){
		freopen(taskname".inp", "r", stdin);
	}
	cin >> n;
	if(n <= 300){
		sub2::solve();
	}
	else{
		sub1345::solve();
	}
}

Compilation message (stderr)

passport.cpp: In function 'int main()':
passport.cpp:47:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |                 freopen(taskname".inp", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 16 / 16
• Subtask 3: 0 / 24
• Subtask 4: 0 / 8
• Subtask 5: 0 / 46