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Submission #118551

# Submission time Handle Problem Language Result Execution time Memory
118551 2019-06-19T08:00:02 Z roseanne_pcy Palembang Bridges (APIO15_bridge) C++14
100 / 100
 100 ms 6124 KB 
#include <bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
using namespace std;
#define X first
#define Y second
#define pb push_back
typedef pair<int, int> ii;
typedef long long ll;

const int maxn = 1e5+5;

int k, n;

ii foo[maxn];
ll base = 0;

bool cmp(ii a, ii b)
{
	return a.X+a.Y< b.X+b.Y;
}

ll v1[maxn], v2[maxn];

priority_queue<int> pq1;
priority_queue<int, vector<int>, greater<int> > pq2;
ll s1 = 0, s2 = 0;

void proc(int x)
{
	if(pq1.empty() && pq2.empty())
	{
		pq1.push(x);
		s1 += x;
	}
	else if(pq1.empty())
	{
		if(x< pq2.top()) pq1.push(x), s1 += x;
		else pq2.push(x), s2 += x;
	}
	else
	{
		if(x> pq1.top()) pq2.push(x), s2 += x;
		else pq1.push(x), s1 += x;
	}
}

void adjust()
{
	if(pq1.size() == pq2.size()) return;
	if(pq1.size()> pq2.size())
	{
		int x = pq1.top(); pq1.pop();
		s1 -= x;
		pq2.push(x); s2 += x;
	}
	else
	{
		int x = pq2.top(); pq2.pop();
		s2 -= x;
		pq1.push(x); s1 += x;
	}
}

int main()
{
	scanf("%d %d", &k, &n);
	int m = 0;
	for(int i = 1; i<= n; i++)
	{
		char a, b;
		int x, y;
		scanf(" %c %d %c %d", &a, &x, &b, &y);
		if(a == b)
		{
			base += abs(x-y);
			continue;
		}
		if(abs(x)> abs(y)) swap(x, y);
		m++;
		foo[m] = {x, y};
	}
	n = m;
	sort(foo+1, foo+n+1, cmp);
	for(int i = 1; i<= n; i++)
	{
		int x = foo[i].X, y = foo[i].Y;
		proc(x); proc(y);
		adjust();
		v1[i] = s2-s1;
	}
	while(!pq1.empty()) pq1.pop(); s1 = 0;
	while(!pq2.empty()) pq2.pop(); s2 = 0;
	for(int i = n; i>= 1; i--)
	{
		int x = foo[i].X, y = foo[i].Y;
		proc(x); proc(y);
		adjust();
		v2[i] = s2-s1;
	}
	ll best = 1e18;
	if(k == 1) best = v1[n];
	else
	{
		best = min(v1[n], v2[1]);
		for(int i = 1; i<= n; i++)
		{
			best = min(best, v1[i]+v2[i+1]);
		}
	}
	printf("%lld\n", best+base+n);
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:92:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
  while(!pq1.empty()) pq1.pop(); s1 = 0;
  ^~~~~
bridge.cpp:92:33: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
  while(!pq1.empty()) pq1.pop(); s1 = 0;
                                 ^~
bridge.cpp:93:2: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
  while(!pq2.empty()) pq2.pop(); s2 = 0;
  ^~~~~
bridge.cpp:93:33: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
  while(!pq2.empty()) pq2.pop(); s2 = 0;
                                 ^~
bridge.cpp:67:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &k, &n);
  ~~~~~^~~~~~~~~~~~~~~~~
bridge.cpp:73:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf(" %c %d %c %d", &a, &x, &b, &y);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 3 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 3 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 3 ms 512 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 3 ms 384 KB Output is correct
5 Correct 3 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 3 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 3 ms 384 KB Output is correct
10 Correct 3 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 43 ms 4464 KB Output is correct
13 Correct 93 ms 5856 KB Output is correct
14 Correct 76 ms 4536 KB Output is correct
15 Correct 54 ms 3680 KB Output is correct
16 Correct 44 ms 5356 KB Output is correct
17 Correct 82 ms 6108 KB Output is correct
18 Correct 60 ms 5524 KB Output is correct
19 Correct 91 ms 6124 KB Output is correct
20 Correct 59 ms 5612 KB Output is correct
21 Correct 83 ms 5740 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB Output is correct
2 Correct 2 ms 432 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 3 ms 384 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 384 KB Output is correct
2 Correct 2 ms 408 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 384 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 2 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 3 ms 384 KB Output is correct
14 Correct 2 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 256 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 3 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 3 ms 384 KB Output is correct
24 Correct 3 ms 384 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 384 KB Output is correct
3 Correct 2 ms 384 KB Output is correct
4 Correct 2 ms 384 KB Output is correct
5 Correct 2 ms 428 KB Output is correct
6 Correct 2 ms 384 KB Output is correct
7 Correct 2 ms 384 KB Output is correct
8 Correct 2 ms 384 KB Output is correct
9 Correct 2 ms 384 KB Output is correct
10 Correct 2 ms 384 KB Output is correct
11 Correct 3 ms 384 KB Output is correct
12 Correct 2 ms 384 KB Output is correct
13 Correct 2 ms 384 KB Output is correct
14 Correct 3 ms 384 KB Output is correct
15 Correct 3 ms 384 KB Output is correct
16 Correct 2 ms 384 KB Output is correct
17 Correct 3 ms 384 KB Output is correct
18 Correct 2 ms 384 KB Output is correct
19 Correct 2 ms 384 KB Output is correct
20 Correct 3 ms 384 KB Output is correct
21 Correct 3 ms 384 KB Output is correct
22 Correct 3 ms 384 KB Output is correct
23 Correct 2 ms 384 KB Output is correct
24 Correct 3 ms 384 KB Output is correct
25 Correct 45 ms 4460 KB Output is correct
26 Correct 69 ms 4716 KB Output is correct
27 Correct 92 ms 5392 KB Output is correct
28 Correct 94 ms 6000 KB Output is correct
29 Correct 100 ms 5912 KB Output is correct
30 Correct 50 ms 3372 KB Output is correct
31 Correct 42 ms 5356 KB Output is correct
32 Correct 79 ms 5996 KB Output is correct
33 Correct 59 ms 5524 KB Output is correct
34 Correct 87 ms 5960 KB Output is correct
35 Correct 56 ms 5612 KB Output is correct
36 Correct 83 ms 5736 KB Output is correct
37 Correct 41 ms 4588 KB Output is correct