Submission #642022

#TimeUsernameProblemLanguageResultExecution timeMemory
642022QwertyPiToy Train (IOI17_train)C++14
15 / 100
2083 ms1752 KiB
#include <bits/stdc++.h>
#define fi first
#define se second

#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++){
		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()) {
				charged[v] = true;
				for(auto& [k, id] : H[v]){
					if(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]){
				losed[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() - (!rch[v] && self[v])) {
				losed[v] = true;
				for(auto& [k, id] : H[v]){
					if(used[id]) continue;
					used[id] = true;
					cnt[k]++; dq.push_back({((!a[k]) << 16) + cnt[k], k});
				}
			}
		}
	}
	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

Compilation message (stderr)

train.cpp: In function 'std::vector<int> who_wins(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>)':
train.cpp:36:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   36 |     for(auto& [k, id] : H[j]){
      |               ^
train.cpp:45:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |    if(t.fi >= G[v].size()) {
      |       ~~~~~^~~~~~~~~~~~~~
train.cpp:47:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   47 |     for(auto& [k, id] : H[v]){
      |               ^
train.cpp:61:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   61 |     for(auto& [k, id] : H[j]){
      |               ^
train.cpp:70:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |    if(t.fi >= G[v].size() - (!rch[v] && self[v])) {
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
train.cpp:72:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   72 |     for(auto& [k, id] : H[v]){
      |               ^
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