oj.uz

답안 #650533

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
650533 2022-10-14T08:00:11 Z welleyth Graph (BOI20_graph) C++17
0 / 100
 28 ms 51636 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;

#define int long long
#define pb push_back
#define mp make_pair

#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")

constexpr int N = (int)(1 << 21);
constexpr int md = (int)2e5 + 111;
constexpr int INF = (int)1e9 + 111;

mt19937 rnd(time(nullptr));

bool used[N];
int val[N];
vector<pair<int,int>> g[N];

bool can = true;
int S = 0;

void dfs(int v){
    if(!can)
        return;
    used[v] = 1;
    set<int> st[3];
//    cerr << "v = " << v << "\n";
    for(auto&[to,w] : g[v]){
        if(used[to]){
//            cerr << "v,to = " << v << " " << to << ", val[to] = " << val[to] << "\n";
            st[w].insert(val[to]);
            continue;
        }
    }
    if(st[1].size() > 1 || st[2].size() > 1){
        can = false;
        return;
    }
    if(!st[1].empty() && !st[2].empty() && *st[2].begin()-*st[1].begin() != 2){
        can = false;
        return;
    }
    if(st[1].empty() && st[2].empty()){
        val[v] = S;
    } else if(!st[1].empty()){
        val[v] = 2 - *st[1].begin();
    } else if(!st[2].empty()){
        val[v] = 4 - *st[2].begin();
    }
//    cerr << "v = " << v << ", val[v] = " << val[v] << "\n";
    for(auto&[to,w] : g[v]){
        if(!used[to])
            dfs(to);
    }
    return;
}

void solve(){
    int n,m;
    cin >> n >> m;

    for(int i = 0; i < m; i++){
        int a,b,c;
        cin >> a >> b >> c;
        g[a].pb(mp(b,c));
        g[b].pb(mp(a,c));
    }

    vector<int> smallestSum;
    int mn = INF;

    for(int j = -2; j <= 2; j++){
        memset(used,0,sizeof used);
        S = j;
        can = true;
        for(int i = 1; i <= n; i++){
            if(!used[i])
                dfs(i);
        }
        if(!can)
            continue;
        int sum = 0;
        for(int i = 1; i <= n; i++){
            sum += val[i];
        }
        if(sum < mn){
            mn = sum;
            smallestSum.clear();
            for(int i = 1; i <= n; i++){
                smallestSum.pb(val[i]);
            }
        }
//        cout << "YES\n";
//        for(int i = 1; i <= n; i++)
//            cout << val[i]/2.0 << " ";
//        return;
    }

    if(mn == INF){
        cout << "NO\n";
        return;
    }

    cout << "YES\n";
    for(auto& x : smallestSum)
        cout << x/2.0 << " ";
    cout << "\n";

    return;
}

signed main(){
    ios::sync_with_stdio(false);cin.tie(nullptr);cout.tie(nullptr);
//    init();
    int tests = 1;
//    cin >> tests;
    for(int test = 1; test <= tests; test++){
//        cerr << "test = " << test << "\n";
        solve();
    }
    return 0;
}
/**
**/

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 51636 KB answer = YES
2 Incorrect 26 ms 51592 KB participant answer is larger than the answer of jury
3 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 51636 KB answer = YES
2 Incorrect 26 ms 51592 KB participant answer is larger than the answer of jury
3 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 51636 KB answer = YES
2 Incorrect 26 ms 51592 KB participant answer is larger than the answer of jury
3 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 51636 KB answer = YES
2 Incorrect 26 ms 51592 KB participant answer is larger than the answer of jury
3 Halted 0 ms 0 KB -

Subtask #5
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 28 ms 51636 KB answer = YES
2 Incorrect 26 ms 51592 KB participant answer is larger than the answer of jury
3 Halted 0 ms 0 KB -