oj.uz

Submission #503690

# Submission time Handle Problem Language Result Execution time Memory
503690 2022-01-08T15:34:17 Z XII timeismoney (balkan11_timeismoney) C++17
40 / 100
 70 ms 588 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.t * X + x.c * (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, r = MAX;
    for(int step = 1; step <= 100; ++step){
        double m1 = l + (r - l) / 3;
        double m2 = r - (r - l) / 3;
        if(check(m1) > check(m2)) r = 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
40.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 0 ms 316 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 2 ms 324 KB Output is correct
6 Correct 2 ms 316 KB Output is correct
7 Correct 10 ms 332 KB Output is correct
8 Correct 45 ms 588 KB Output is correct
9 Incorrect 0 ms 204 KB Output isn't correct
10 Incorrect 1 ms 204 KB Output isn't correct
11 Incorrect 1 ms 204 KB Output isn't correct
12 Incorrect 1 ms 204 KB Output isn't correct
13 Incorrect 1 ms 204 KB Output isn't correct
14 Incorrect 2 ms 332 KB Output isn't correct
15 Incorrect 2 ms 332 KB Output isn't correct
16 Incorrect 10 ms 384 KB Output isn't correct
17 Incorrect 10 ms 316 KB Output isn't correct
18 Incorrect 11 ms 332 KB Output isn't correct
19 Incorrect 56 ms 588 KB Output isn't correct
20 Incorrect 70 ms 584 KB Output isn't correct