Submission #602565

#	Time	Username	Problem	Language	Result	Execution time	Memory
602565		snasibov05	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	1 ms	296 KiB

bridge

#include <bits/stdc++.h>

using namespace std;

#define oo 1000000000

int 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){
        int cur = 0;
        if (i != 0) cur += (i-1) * arr[i] - pref[i-1];
        if (i != arr.size() - 1) cur += suf[i+1] - (arr.size() - i) * arr[i];
        mn = min(mn, cur);
    }

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


    return 0;
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:25:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   25 |     for (int i = 1; i < arr.size(); ++i) pref[i] = pref[i-1] + arr[i];
      |                     ~~^~~~~~~~~~~~
bridge.cpp:30:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for (int i = 0; i < arr.size(); ++i){
      |                     ~~^~~~~~~~~~~~
bridge.cpp:33:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |         if (i != arr.size() - 1) cur += suf[i+1] - (arr.size() - i) * arr[i];
      |             ~~^~~~~~~~~~~~~~~~~

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