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Submission #148094

# Submission time Handle Problem Language Result Execution time Memory
148094 2019-08-31T13:50:02 Z WhipppedCream Palembang Bridges (APIO15_bridge) C++17
100 / 100
 112 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 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 3 ms 380 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 380 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 504 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 3 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 3 ms 376 KB Output is correct
8 Correct 3 ms 380 KB Output is correct
9 Correct 3 ms 376 KB Output is correct
10 Correct 3 ms 376 KB Output is correct
11 Correct 3 ms 376 KB Output is correct
12 Correct 50 ms 4588 KB Output is correct
13 Correct 112 ms 5988 KB Output is correct
14 Correct 88 ms 4608 KB Output is correct
15 Correct 64 ms 3800 KB Output is correct
16 Correct 49 ms 5356 KB Output is correct
17 Correct 93 ms 6048 KB Output is correct
18 Correct 65 ms 5480 KB Output is correct
19 Correct 101 ms 5996 KB Output is correct
20 Correct 66 ms 5612 KB Output is correct
21 Correct 96 ms 5712 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 296 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 296 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 3 ms 404 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 252 KB Output is correct
2 Correct 2 ms 256 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 3 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 376 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 2 ms 368 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 3 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 376 KB Output is correct
23 Correct 3 ms 504 KB Output is correct
24 Correct 3 ms 376 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 2 ms 376 KB Output is correct
6 Correct 2 ms 404 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 376 KB Output is correct
9 Correct 2 ms 380 KB Output is correct
10 Correct 2 ms 376 KB Output is correct
11 Correct 2 ms 376 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 3 ms 376 KB Output is correct
15 Correct 3 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 3 ms 376 KB Output is correct
18 Correct 2 ms 376 KB Output is correct
19 Correct 3 ms 376 KB Output is correct
20 Correct 3 ms 376 KB Output is correct
21 Correct 3 ms 376 KB Output is correct
22 Correct 3 ms 380 KB Output is correct
23 Correct 3 ms 376 KB Output is correct
24 Correct 3 ms 380 KB Output is correct
25 Correct 53 ms 4456 KB Output is correct
26 Correct 79 ms 4624 KB Output is correct
27 Correct 105 ms 5292 KB Output is correct
28 Correct 110 ms 5868 KB Output is correct
29 Correct 110 ms 5884 KB Output is correct
30 Correct 58 ms 3376 KB Output is correct
31 Correct 50 ms 5356 KB Output is correct
32 Correct 94 ms 6008 KB Output is correct
33 Correct 66 ms 5772 KB Output is correct
34 Correct 103 ms 6124 KB Output is correct
35 Correct 66 ms 5556 KB Output is correct
36 Correct 100 ms 5740 KB Output is correct
37 Correct 47 ms 4456 KB Output is correct