oj.uz

Submission #253178

# Submission time Handle Problem Language Result Execution time Memory
253178 2020-07-27T09:42:51 Z 14kg Palembang Bridges (APIO15_bridge) C++11
100 / 100
 85 ms 7056 KB 
#include <stdio.h>
#include <algorithm>
#include <queue>
#include <vector>
#include <functional>
#define N 100002
#define INF 999999999999999999
#define min2(x,y) (x<y?x:y)
 
using namespace std;
int n, K;
long long dp1[N], dp2[N];
pair<int, int> in[N];
priority_queue<pair<int, int>, vector<pair<int, int> >, greater<pair<int, int> > > Q1;
priority_queue<pair<int, int> > Q2;
 
bool cmp(pair<int, int> x, pair<int, int> y) {
	return x.first + x.second < y.first + y.second;
}
int main() {
	//freopen("input.txt", "r", stdin);
	int k, x, y;
	char in_a, in_b;
	long long R = 0;
 
	scanf("%d %d ", &K, &k);
	while (k--) {
		scanf("%c %d %c %d ", &in_a, &x, &in_b, &y);
		if (x > y) x += y, y = x - y, x -= y;
		R += (long long)(y - x);
		if (in_a != in_b) R++, in[++n] = { x,y };
	} sort(in + 1, in + n + 1, cmp);
 
	k = 0, x = 0, y = 0;
	for (int i = 1; i <= n; i++) {
		dp1[i] = dp1[i - 1];
 
		if (k < in[i].first) {
			y++, dp1[i] += (long long)(in[i].first - k);
			Q1.push({ in[i].first,1 }), Q1.push({ in[i].second,2 });
		}
		else if (in[i].second < k) 
			x++, dp1[i] += (long long)(k - in[i].second);
		else Q1.push({ in[i].second,2 });
 
		while (Q1.empty() == false && x < y) {
			dp1[i] += (long long)(Q1.top().first - k)*(long long)(x - y);
			if (Q1.top().second == 1) y--;
			else x++;
			k = Q1.top().first, Q1.pop();
		}
	}
 
	k = in[n].second, x = 0, y = 0;
	for (int i = n; i >= 1; i--) {
		dp2[i] = dp2[i + 1];
 
		if (in[i].second < k) {
			x++, dp2[i] += (long long)(k - in[i].second);
			Q2.push({ in[i].second,1 }), Q2.push({ in[i].first,2 });
		}
		else if (in[i].first > k)
			y++, dp2[i] += (long long)(in[i].first - k);
		else Q2.push({ in[i].first,2 });
 
		while (Q2.empty() == false && x > y) {
			dp2[i] += (long long)(k - Q2.top().first)*(long long)(y - x);
			if (Q2.top().second == 1) x--;
			else y++;
			k = Q2.top().first, Q2.pop();
		}
	}
	
	if (K == 1) printf("%lld", R + dp1[n] * 2);
	else {
		long long MIN = INF;
		for (int i = 0; i <= n; i++) MIN = min2(MIN, dp1[i] + dp2[i + 1]);
		printf("%lld", R + MIN * 2);
	}
}

Compilation message

bridge.cpp: In function 'int main()':
bridge.cpp:26:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d ", &K, &k);
  ~~~~~^~~~~~~~~~~~~~~~~~
bridge.cpp:28:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%c %d %c %d ", &in_a, &x, &in_b, &y);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 2 ms 396 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 384 KB Output is correct
4 Correct 1 ms 384 KB Output is correct
5 Correct 1 ms 384 KB Output is correct
6 Correct 1 ms 384 KB Output is correct
7 Correct 1 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 1 ms 384 KB Output is correct
10 Correct 1 ms 384 KB Output is correct
11 Correct 1 ms 384 KB Output is correct
12 Correct 43 ms 5484 KB Output is correct
13 Correct 85 ms 7020 KB Output is correct
14 Correct 65 ms 5740 KB Output is correct
15 Correct 57 ms 4208 KB Output is correct
16 Correct 44 ms 6380 KB Output is correct
17 Correct 70 ms 7020 KB Output is correct
18 Correct 52 ms 6636 KB Output is correct
19 Correct 79 ms 7020 KB Output is correct
20 Correct 61 ms 6636 KB Output is correct
21 Correct 74 ms 6764 KB Output is correct

Subtask #3
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 0 ms 384 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 1 ms 384 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 384 KB Output is correct
12 Correct 0 ms 256 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 256 KB Output is correct
4 Correct 0 ms 384 KB Output is correct
5 Correct 0 ms 384 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 384 KB Output is correct
9 Correct 1 ms 256 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 0 ms 256 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 1 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 0 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct

Subtask #5
37.0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 256 KB Output is correct
2 Correct 0 ms 256 KB Output is correct
3 Correct 1 ms 256 KB Output is correct
4 Correct 0 ms 368 KB Output is correct
5 Correct 0 ms 256 KB Output is correct
6 Correct 0 ms 256 KB Output is correct
7 Correct 0 ms 384 KB Output is correct
8 Correct 0 ms 256 KB Output is correct
9 Correct 0 ms 256 KB Output is correct
10 Correct 0 ms 384 KB Output is correct
11 Correct 1 ms 256 KB Output is correct
12 Correct 0 ms 256 KB Output is correct
13 Correct 1 ms 384 KB Output is correct
14 Correct 1 ms 384 KB Output is correct
15 Correct 1 ms 384 KB Output is correct
16 Correct 0 ms 384 KB Output is correct
17 Correct 1 ms 384 KB Output is correct
18 Correct 1 ms 384 KB Output is correct
19 Correct 1 ms 384 KB Output is correct
20 Correct 1 ms 384 KB Output is correct
21 Correct 1 ms 384 KB Output is correct
22 Correct 1 ms 384 KB Output is correct
23 Correct 1 ms 384 KB Output is correct
24 Correct 1 ms 384 KB Output is correct
25 Correct 44 ms 5612 KB Output is correct
26 Correct 62 ms 5740 KB Output is correct
27 Correct 78 ms 6508 KB Output is correct
28 Correct 82 ms 7020 KB Output is correct
29 Correct 82 ms 7020 KB Output is correct
30 Correct 47 ms 3824 KB Output is correct
31 Correct 46 ms 6380 KB Output is correct
32 Correct 70 ms 7020 KB Output is correct
33 Correct 53 ms 6764 KB Output is correct
34 Correct 78 ms 7056 KB Output is correct
35 Correct 60 ms 6636 KB Output is correct
36 Correct 74 ms 6764 KB Output is correct
37 Correct 42 ms 5484 KB Output is correct