Submission #766384

#	Time	Username	Problem	Language	Result	Execution time	Memory
766384		Tob	Palembang Bridges (APIO15_bridge)	C++14	0 / 100	0 ms	212 KiB

bridge

#include <bits/stdc++.h>

#define ll long long
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define pb push_back
#define FIO ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

typedef pair <ll, ll> pii;

int k, n;

int main () {
	cin >> k >> n;
	
	ll res = 0;
	vector <pii> v;
	for (int i = 0; i < n; i++) {
		char ca, cb;
		ll a, b;
		cin >> ca >> a >> cb >> b;
		if (a > b) swap(a, b);
		if (ca != cb) v.pb({a, b});
		res += b-a;
	}
	int m = v.size();
	
	if (k == 1) {
		ll com = 0;
		multiset <ll> s;
		for (auto it : v) {
			com += it.F;
			s.insert(it.F);
			s.insert(it.S);
		}
		ll la = 0, sl = -m, sol = 1e18;
		for (auto it : s) {
			com += (it - la)*sl;
			sl++;
			la = it;
			sol = min(sol, com);
		}
		cout << 2*sol+m+res;
	}
	else {
		ll res = 1e18;
		
	}

	return 0;
}

Compilation message (stderr)

bridge.cpp: In function 'int main()':
bridge.cpp:49:6: warning: unused variable 'res' [-Wunused-variable]
   49 |   ll res = 1e18;
      |      ^~~

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