Submission #602573

#	Time	Username	Problem	Language	Result	Execution time	Memory
602573		snasibov05	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	2 ms	352 KiB

bridge

#include <bits/stdc++.h>

using namespace std;

#define oo 1000000000
#define int long long

signed main() {
    int k, n; cin >> k >> n;
    int ans = 0;
    vector<int> arr;
    for (int i = 0; i < n; ++i){
        char t1, t2; int x1, x2;
        cin >> t1 >> x1 >> t2 >> x2;
        if (t1 == t2) ans += abs(x2 - x1);
        else arr.push_back(x1), arr.push_back(x2);
    }

    if (arr.size() == 0){
        cout << ans << "\n";
        return 0;
    }

    sort(arr.begin(), arr.end());
    vector<int> pref(arr.size()); pref[0] = arr[0];
    for (int i = 1; i < arr.size(); ++i) pref[i] = pref[i-1] + arr[i];
    vector<int> suf(arr.size()); suf.back() = arr.back();
    for (int i = arr.size() - 2; i >= 0; --i) suf[i] = suf[i+1] + arr[i];

    int mn = oo;
    for (int i = 0; i < arr.size(); ++i){
        mn = min(mn, arr[i] * (i+1) - pref[i] + suf[i] - arr[i] * ((int)arr.size() - i));
    }

    ans += arr.size() / 2ll;
    ans += mn;
    cout << ans << "\n";


    return 0;
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:26:23: 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]
   26 |     for (int i = 1; i < arr.size(); ++i) pref[i] = pref[i-1] + arr[i];
      |                     ~~^~~~~~~~~~~~
bridge.cpp:31:23: 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]
   31 |     for (int i = 0; i < arr.size(); ++i){
      |                     ~~^~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 14
• Subtask 3: 0 / 9
• Subtask 4: 0 / 32
• Subtask 5: 0 / 37