답안 #98120

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
98120	2019-02-20T20:38:19 Z	dalgerok	시간이 돈 (balkan11_timeismoney)	C++17	100 / 100	1165 ms	1276 KB

timeismoney

#include<bits/stdc++.h>
using namespace std;


const int N = 2005;
const long long INF = 1e18;
const double eps = 1e-9;


int n, m;


bool used[N];
int p[N], pt[N], pc[N];
double d[N];
long long ans = 9e18, ans1, ans2;
vector < pair < int, int > > anss;

vector < pair < int, pair < int, int > > > g[N];
vector < pair < pair < int, int >, pair < int, int > > > e, cur_e;

inline void build(double x){
    for(int i = 1; i <= n; i++){
        d[i] = INF;
        p[i] = -1;
        used[i] = false;
    }
    d[1] = 0;
    set < pair < double, int > > q;
    q.insert(make_pair(0, 1));
    cur_e.clear();
    vector < pair < int, int > > s;
    long long cur1 = 0, cur2 = 0;
    for(int i = 1; i <= n; i++){
        int v = q.begin()->second;
        q.erase(q.begin());
        used[v] = true;
        if(p[v] != -1){
            cur_e.push_back(make_pair(make_pair(v, p[v]), make_pair(pt[v], pc[v])));
            cur_e.push_back(make_pair(make_pair(p[v], v), make_pair(pt[v], pc[v])));
            ///cout << "KEK: " << v << " " << p[v] << " " << d[v] << " " << d[p[v]] << " " << pt[v] << " " << pc[v] << "\n";
            cur1 += pt[v];
            cur2 += pc[v];
            s.push_back(make_pair(v, p[v]));
        }
        for(auto it : g[v]){
            int to = it.first,
                t = it.second.first,
                c = it.second.second;
            double val = t * x + c * (1 - x);
            if(!used[to] && d[to] > val){
                q.erase(make_pair(d[to], to));
                d[to] = val;
                p[to] = v;
                pt[to] = t;
                pc[to] = c;
                q.insert(make_pair(d[to], to));
            }
        }
    }
    ///cout << "VALS: " << cur1 << " " << cur2 << "\n";
    if(1LL * cur1 * cur2 < ans){
        ans = 1LL * cur1 * cur2;
        ans1 = cur1;
        ans2 = cur2;
        anss = s;
    }
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= m; i++){
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        a += 1;
        b += 1;
        g[a].push_back(make_pair(b, make_pair(c, d)));
        g[b].push_back(make_pair(a, make_pair(c, d)));
        e.push_back(make_pair(make_pair(a, b), make_pair(c, d)));
        e.push_back(make_pair(make_pair(b, a), make_pair(c, d)));
    }
    double x = 0;
    while(true){
        double new_x = 1;
        build(x);
        for(auto it1 : cur_e){
            for(auto it2 : g[it1.first.first]){
                int t1 = it1.second.first, c1 = it1.second.second,
                    t2 = it2.second.first, c2 = it2.second.second;
                double xx = (c2 - c1) / (double)(t1 - c1 - t2 + c2);
                if(x < xx && xx <= new_x){
                    new_x = xx;
                }
            }
            for(auto it2 : g[it1.first.second]){
                int t1 = it1.second.first, c1 = it1.second.second,
                    t2 = it2.second.first, c2 = it2.second.second;
                double xx = (c2 - c1) / (double)(t1 - c1 - t2 + c2);
                if(x < xx && xx <= new_x){
                    new_x = xx;
                }
            }
        }
        if(x == new_x){
            break;
        }
        x = new_x;
    }
    cout << ans1 << " " << ans2 << "\n";
    for(auto it : anss){
        cout << it.first - 1 << " " << it.second - 1 << "\n";
    }
}

Subtask #1

100.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	2 ms	384 KB	Output is correct
2	Correct	2 ms	384 KB	Output is correct
3	Correct	2 ms	384 KB	Output is correct
4	Correct	2 ms	384 KB	Output is correct
5	Correct	2 ms	384 KB	Output is correct
6	Correct	3 ms	512 KB	Output is correct
7	Correct	4 ms	640 KB	Output is correct
8	Correct	7 ms	1276 KB	Output is correct
9	Correct	2 ms	384 KB	Output is correct
10	Correct	2 ms	384 KB	Output is correct
11	Correct	3 ms	384 KB	Output is correct
12	Correct	3 ms	384 KB	Output is correct
13	Correct	3 ms	384 KB	Output is correct
14	Correct	31 ms	384 KB	Output is correct
15	Correct	25 ms	520 KB	Output is correct
16	Correct	283 ms	640 KB	Output is correct
17	Correct	300 ms	640 KB	Output is correct
18	Correct	290 ms	640 KB	Output is correct
19	Correct	1102 ms	1276 KB	Output is correct
20	Correct	1165 ms	1276 KB	Output is correct