oj.uz

Submission #503694

# Submission time Handle Problem Language Result Execution time Memory
503694 2022-01-08T15:36:46 Z XII timeismoney (balkan11_timeismoney) C++17
95 / 100
 120 ms 460 KB 
#include <bits/stdc++.h>
using namespace std;

using ll = long long;

#define fi first
#define se second
#define mp make_pair
#define eb emplace_back
#define ALL(x) (x).begin(), (x).end()

#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define FORU(i, a, b) for(int i = (a); i <= (b); ++i)
#define FORD(i, a, b) for(int i = (a); i >= (b); --i)

#define IOS cin.tie(0)->sync_with_stdio(false);
#define PROB "timeismoney_TernarySearch"
void Fi(){
    if(fopen(PROB".inp", "r")){
        freopen(PROB".inp", "r", stdin);
        freopen(PROB".out", "w", stdout);
    }
}

const int N = 200 + 1;
const int M = 10000 + 1;
const double MAX = 1e5;

struct edge{
    int u, v, t, c;
    double w;
    const bool operator<(const edge &ot){
        return w < ot.w;
    }
};
vector<edge> ed;

using pi = pair<int, int>;
using pl = pair<ll, ll>;
int n, m;
pl ans;
pi mst[N];
int cnt;

int par[N];
void init(){
    FOR(i, 0, n) par[i] = -1;
}
int root(int v){
    return (par[v] < 0) ? v : par[v] = root(par[v]);
}
bool join(int x, int y){
    if((x = root(x)) == (y = root(y))) return false;
    if(-par[x] < -par[y]) swap(x, y);
    par[x] += par[y];
    par[y] = x;
    return true;
}

ll check(const double &X){
    for(edge &x: ed){
        x.w = (x.c * X + x.t * (MAX - X));
    }
    sort(ALL(ed));
    cnt = 0;
    ans = {0, 0};
    init();
    for(edge x: ed){
        if(join(x.u, x.v)){
            ans.fi += x.t;
            ans.se += x.c;
            mst[++cnt] = {x.u, x.v};
        }
    }
    return ans.fi * ans.se;
}

int main(){
    IOS;
    Fi();
    cin >> n >> m;
    ed.resize(m);
    for(edge &x: ed) cin >> x.u >> x.v >> x.t >> x.c;
    double l = 0, h = MAX;
    for(int step = 1; step <= 200; ++step){
        double m1 = (2 * l + h) / 3;
        double m2 = (l + h * 2) / 3;
        if(check(m1) < check(m2)) h = m2;
        else l = m1;
    }
    check(l);
    cout << ans.fi << " " << ans.se << "\n";
    FOR(i, 1, n) cout << mst[i].fi << " " << mst[i].se << "\n";
    return 0;
}

Compilation message

timeismoney.cpp: In function 'void Fi()':
timeismoney.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen(PROB".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
timeismoney.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen(PROB".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
95.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 4 ms 204 KB Output is correct
6 Correct 4 ms 204 KB Output is correct
7 Correct 18 ms 360 KB Output is correct
8 Correct 89 ms 460 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 4 ms 204 KB Output is correct
15 Incorrect 3 ms 204 KB Output isn't correct
16 Correct 18 ms 332 KB Output is correct
17 Correct 21 ms 364 KB Output is correct
18 Correct 18 ms 364 KB Output is correct
19 Correct 103 ms 460 KB Output is correct
20 Correct 120 ms 460 KB Output is correct