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Submission #883558

# Submission time Handle Problem Language Result Execution time Memory
883558 2023-12-05T12:09:35 Z SalihSahin Palembang Bridges (APIO15_bridge) C++14
22 / 100
 47 ms 2816 KB 
#include<bits/stdc++.h>
#define int long long
#define pb push_back
#define mp make_pair 
using namespace std;

typedef long long ll;

const int inf = 1e9 * 2;
const int mod = 1e9 + 7;
const int N = 3e4 + 5;


ll dis(pair<ll, ll> i, ll p){
    if(i.first <= p && i.second >= p) return 0;
    else if(i.first > p) return i.first - p;
    else return p - i.second;
}

vector<pair<int, int> > a;

ll check(int m){
    ll val = 0;
    for(auto itr: a){
        val += dis(itr, m) * 2;
    }

    return val;
}

ll check2(int m, int p){
    ll val = 0;
    for(auto itr: a){
        val += min(dis(itr, m), dis(itr, p)) * 2;
    }

    return val;
}

int32_t main(){
    ios_base::sync_with_stdio(false), cin.tie();
    int k, n;
    cin>>k>>n;
    ll ans = 0;
    char h, o;
    int hx, ox;

    for(int i = 0; i < n; i++){
        cin>>h>>hx>>o>>ox;
        if(h != o){
            if(hx > ox) swap(hx, ox);
            a.pb(mp(hx, ox));
        }
        ans += abs(hx - ox);
    }
    ans += a.size();

    if(!a.size()){
        cout<<ans<<endl;
    }
    else if(k == 1){
        int l = 0, r = mod;
        while(l < r){
            int m = (l + r)/2;

            ll x = check(m), y = check(m+1);

            if(x <= y) r = m;
            else l = m + 1;
        }

        ans += check(l);
        cout<<ans<<endl;
    }
    else{
        vector<int> points;
        for(auto itr: a){
            points.pb(itr.first);
            points.pb(itr.second);
        }
        sort(points.begin(), points.end());

        int add = inf;
        for(int i = 0; i < points.size(); i++){
            int p = points[i];
            int l = 0, r = p;
            while(l < r){
                int m = (l + r)/2;

                int x = check2(m, p), y = check2(m+1, p);
                if(x <= y) r = m;
                else l = m+1;
            }

            add = min(add, check2(l, p));
            l = p, r = mod-7;
            while(l < r){
                int m = (l + r)/2;

                int x = check2(m, p), y = check2(m+1, p);
                if(x < y) r = m;
                else l = m+1;
            }

            add = min(add, check2(l, p));
        }
        ans += add;
        cout<<ans<<endl;
    }
    return 0;
}

Compilation message

bridge.cpp: In function 'int32_t main()':
bridge.cpp:84:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   84 |         for(int i = 0; i < points.size(); i++){
      |                        ~~^~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 18 ms 2520 KB Output is correct
13 Correct 47 ms 2520 KB Output is correct
14 Correct 27 ms 2520 KB Output is correct
15 Correct 27 ms 1500 KB Output is correct
16 Correct 20 ms 2520 KB Output is correct
17 Correct 23 ms 2568 KB Output is correct
18 Correct 22 ms 2564 KB Output is correct
19 Correct 47 ms 2464 KB Output is correct
20 Correct 41 ms 2816 KB Output is correct
21 Correct 41 ms 2520 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Incorrect 4 ms 464 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 344 KB Output is correct
4 Incorrect 4 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 2 ms 348 KB Output is correct
4 Incorrect 4 ms 348 KB Output isn't correct
5 Halted 0 ms 0 KB -