Submission #670935

#	Time	Username	Problem	Language	Result	Execution time	Memory
670935		Dan4Life	Palembang Bridges (APIO15_bridge)	C++17	0 / 100	2 ms	368 KiB

bridge

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define fi first
#define se second
using ll = long long;
using pii = pair<int,int>;
#define all(a) a.begin(),a.end()
#define sz(a) (int)a.size()
const int maxn = (int)1e5+10;
const ll LINF = (ll)1e18;
vector<int> v;
vector<pii> segments;
deque<pii> bef,dur,aft;
int t, n, sum_bef, sum_dur, sum_aft;
int32_t main() {
	cin >> t >> n; int tot = 0, sum = 0, ans=LINF;
	for(int i = 0; i < n; i++){
		char a, c; int b, d;
		cin >> a >> b >> c >> d;
		if(a==c) tot+=abs(b-d);
		else{
			if(b>d) swap(b,d); tot++;
			segments.pb({b,d});
			v.pb(b), v.pb(d);
		}
	}
	v.pb(0), v.pb(1000000000);
	sort(all(v));sort(all(segments));
	v.erase(unique(all(v)), v.end());
	for(auto u : segments) aft.pb(u), sum_aft+=u.fi+u.se;

	for(auto u : v){
		while(!aft.empty() and aft[0].fi<=u){
			dur.pb(aft[0]); 
			sum_dur+=aft[0].se-aft[0].fi;
			sum_aft-=aft[0].fi+aft[0].se;
			aft.pop_front();
		}

		while(!dur.empty() and dur[0].se<u){
			bef.pb(dur[0]);
			sum_bef+=-dur[0].se-dur[0].fi;
			sum_dur-=dur[0].se-dur[0].se;
			dur.pop_front();
		}

		ans = min(ans, (sz(bef)-sz(aft))*2*u+sum_bef+sum_dur+sum_aft);
	}
	cout << ans+tot;
}

Compilation message (stderr)

bridge.cpp: In function 'int32_t main()':
bridge.cpp:24:4: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   24 |    if(b>d) swap(b,d); tot++;
      |    ^~
bridge.cpp:24:23: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   24 |    if(b>d) swap(b,d); tot++;
      |                       ^~~
bridge.cpp:18:30: warning: unused variable 'sum' [-Wunused-variable]
   18 |  cin >> t >> n; int tot = 0, sum = 0, ans=LINF;
      |                              ^~~

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