제출 #642035

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
642035		QwertyPi	장난감 기차 (IOI17_train)	C++14	100 / 100	805 ms	1908 KiB

train

#include <bits/stdc++.h>
#define fi first
#define se second
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")

#ifndef hkoi
	#include "train.h"
#endif
 
using namespace std;
 
const int N = 5001, M = 20001;
int n, m;
vector<pair<int, int>> G[N], H[N];
 
std::vector<int> who_wins(std::vector<int> a, std::vector<int> r, std::vector<int> u, std::vector<int> v) {
	::n = a.size(), ::m = u.size();
	std::vector<int> losed(n, 0), ans(n, 0);
	std::vector<bool> self(n, 0);
	for(int i = 0; i < n; i++){
		G[i].clear(); H[i].clear();
	}
	for(int i = 0; i < m; i++){
		G[u[i]].push_back({v[i], i});
		H[v[i]].push_back({u[i], i});
		if(u[i] == v[i])
			self[u[i]] = true;
	}
	for(int tr = 0; tr < n; tr++){
		bool changing = false;
		std::vector<int> charged(n, 0), cnt(n, 0);
		deque<pair<int, int>> dq;
		vector<bool> used(m, 0);
		for(int i = 0; i < n; i++) if(r[i] && !losed[i]) charged[i] = true;
		vector<bool> rch(n, 0); for(int i = 0; i < n; i++) if(charged[i]) rch[i] = true;
		for(int j = 0; j < n; j++){
			if(charged[j] == true){
				for(auto& [k, id] : H[j]){
					used[id] = true;
					cnt[k]++; dq.push_back({(a[k] << 16) + cnt[k], k});
				}
			}
		}
		while(dq.size()){
			pair<int, int> t = dq.front(); dq.pop_front();
			int v = t.se;
			if(t.fi >= G[v].size()) {
				if(charged[v]) continue;
				charged[v] = true;
				for(auto& [k, id] : H[v]){
					if(charged[k] || used[id]) continue;
					used[id] = true;
					cnt[k]++; dq.push_back({(a[k] << 16) + cnt[k], k});
				}
			}
		}
	
		used.clear();
		fill(cnt.begin(), cnt.end(), 0);
		
		for(int j = 0; j < n; j++){
			if(!charged[j]){
				if(!losed[j]) changing = true;
				losed[j] = true;
				for(auto& [k, id] : H[j]){
					if(losed[k]) continue;
					used[id] = true;
					cnt[k]++; dq.push_back({((!a[k]) << 16) + cnt[k], k});
				}
			}
		}
		while(dq.size()){
			pair<int, int> t = dq.front(); dq.pop_front();
			int v = t.se;
			if(t.fi >= G[v].size() - (!rch[v] && self[v])) {
				if(losed[v]) continue;
				changing = true; losed[v] = true;
				for(auto& [k, id] : H[v]){
					if(losed[k] || used[id]) continue;
					used[id] = true;
					cnt[k]++; dq.push_back({((!a[k]) << 16) + cnt[k], k});
				}
			}
		}
		if(!changing) break;
	}
	for(int u = 0; u < n; u++){
		ans[u] = !losed[u];
	}
	return ans;
}
 
#ifdef hkoi
 
int main(){
	int n, m; cin >> n >> m;
	vector<int> a; for(int i = 0; i < n; i++) {
		int v; cin >> v; a.push_back(v);
	}
	vector<int> r; for(int i = 0; i < n; i++) {
		int v; cin >> v; r.push_back(v);
	}
	vector<int> u, v; for(int i = 0; i < m; i++){
		int x, y; cin >> x >> y; 
		u.push_back(x); v.push_back(y);
	}
	vector<int> w = who_wins(a, r, u, v);
	for(int i = 0; i < n; i++){
		cout << w[i] << ' ';
	}
	cout << '\n';
}
 
#endif

컴파일 시 표준 에러 (stderr) 메시지

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:39:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   39 |     for(auto& [k, id] : H[j]){
      |               ^
train.cpp:48:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   48 |    if(t.fi >= G[v].size()) {
      |       ~~~~~^~~~~~~~~~~~~~
train.cpp:51:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   51 |     for(auto& [k, id] : H[v]){
      |               ^
train.cpp:66:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   66 |     for(auto& [k, id] : H[j]){
      |               ^
train.cpp:76:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   76 |    if(t.fi >= G[v].size() - (!rch[v] && self[v])) {
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
train.cpp:79:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   79 |     for(auto& [k, id] : H[v]){
      |               ^

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 11 / 11
• Subtask 4: 11 / 11
• Subtask 5: 12 / 12
• Subtask 6: 51 / 51