제출 #706548

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
706548		becaido	Jail (JOI22_jail)	C++17	5 / 100	42 ms	1712 KiB

jail

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 12e4 + 5;

int n, m;
tuple<int, int, int> p[SIZE];

void solve() {
    cin >> n;
    FOR (i, 2, n) {
        int a, b;
        cin >> a >> b;
    }
    cin >> m;
    FOR (i, 1, m) {
        int l, r;
        cin >> l >> r;
        p[i] = {min(l, r), max(l, r), l > r};
    }
    sort(p + 1, p + m + 1);
    int last = 0, t;
    FOR (i, 1, m) {
        auto [l, r, ty] = p[i];
        if (r <= last) {
            cout << "No\n";
            return;
        }
        if (l <= last && ty != t) {
            cout << "No\n";
            return;
        }
        last = r;
        t = ty;
    }
    cout << "Yes\n";
}

int main() {
    Waimai;
    int tt;
    cin >> tt;
    while (tt--) solve();
}

컴파일 시 표준 에러 (stderr) 메시지

jail.cpp: In function 'void solve()':
jail.cpp:47:23: warning: 't' may be used uninitialized in this function [-Wmaybe-uninitialized]
   47 |         if (l <= last && ty != t) {
      |             ~~~~~~~~~~^~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 16
• Subtask 4: 0 / 28
• Subtask 5: 0 / 12
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23