oj.uz

Submission #568554

# Submission time Handle Problem Language Result Execution time Memory
568554 2022-05-25T16:49:33 Z nafis_shifat Skyline (IZhO11_skyline) C++17
100 / 100
 132 ms 104208 KB 
#include<bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
using namespace std;
const int mxn=300+5;
const int inf=1e9;
const int mxv = 210;
int n, h[mxn];
int dp[mxn][mxv][mxv]; 
int gp[mxn][mxv][mxv];
int main() {
	cin >> n;
	for(int i = 1; i <= n; i++) {
		cin >> h[i];
	}

	if(n == 1) {
		cout<<h[1] * 3<<endl;
		return 0;
	}

	for(int i = 0; i <= n; i++) for(int j = 0; j <= mxv; j++) for(int k = 0; k <= mxv; k++) {
		dp[i][j][k] = inf;
		gp[i][j][k] = inf;
	}



	for(int i = 0; i <= min(h[1], h[2]); i++) {
		dp[2][i][0] = 5 * i + 3 * (h[2] - i) + 3 * (h[1] - i);
		gp[2][i][h[2] - i] = min(gp[2][i][h[2] - i], dp[2][i][0]);
	}

	for(int i = h[2]; i >= 0; i--) {
		for(int j = h[2]; j >= 0; j--) {
			gp[2][i][j] = min({gp[2][i][j], gp[2][i + 1][j], gp[2][i][j + 1]});
		}
	}

	for(int p = 3; p <= n; p++) {
		for(int i = 0; i <= min(h[p], h[p - 1]); i++) {
			for(int j = 0; j <= min(h[p] - i, h[p - 1] - i); j++) {
				dp[p][i][j] = gp[p - 1][j][i] + 2 * (i + j) + 3 * (h[p] - i - j);
				gp[p][i][h[p] - i - j] = min(gp[p][i][h[p] - i - j], dp[p][i][j]);
			}
		}

		for(int i = h[p]; i >= 0; i--) {
			for(int j = h[p]; j >= 0; j--) {
				gp[p][i][j] = min({gp[p][i][j], gp[p][i + 1][j], gp[p][i][j + 1]});
			}
		}
	}



	cout<<gp[n][0][0]<<endl;
}

Compilation message

skyline.cpp: In function 'int main()':
skyline.cpp:23:15: warning: iteration 210 invokes undefined behavior [-Waggressive-loop-optimizations]
   23 |   dp[i][j][k] = inf;
      |   ~~~~~~~~~~~~^~~~~
skyline.cpp:22:77: note: within this loop
   22 |  for(int i = 0; i <= n; i++) for(int j = 0; j <= mxv; j++) for(int k = 0; k <= mxv; k++) {
      |                                                                           ~~^~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 2 ms 1328 KB Output is correct
3 Correct 2 ms 2388 KB Output is correct
4 Correct 17 ms 24708 KB Output is correct
5 Correct 2 ms 2736 KB Output is correct
6 Correct 2 ms 4016 KB Output is correct
7 Correct 2 ms 3668 KB Output is correct
8 Correct 2 ms 3028 KB Output is correct
9 Correct 3 ms 5076 KB Output is correct
10 Correct 7 ms 8956 KB Output is correct
11 Correct 34 ms 49332 KB Output is correct
12 Correct 10 ms 10964 KB Output is correct
13 Correct 38 ms 57928 KB Output is correct
14 Correct 54 ms 69320 KB Output is correct
15 Correct 99 ms 95184 KB Output is correct
16 Correct 87 ms 85464 KB Output is correct
17 Correct 132 ms 104104 KB Output is correct
18 Correct 127 ms 103492 KB Output is correct
19 Correct 122 ms 99720 KB Output is correct
20 Correct 130 ms 104208 KB Output is correct