Submission #124853

#	Time	Username	Problem	Language	Result	Execution time	Memory
124853		nvmdava	Aliens (IOI16_aliens)	C++17	25 / 100	152 ms	2552 KiB

aliens

#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;

vector<pair<int, int> > v, t;

long long dp[505][505];

long long take_photos(int n, int m, int k, vector<int> r, vector<int> c){
	
    for(int i = 0; i < n; i++)
    	t.push_back({min(r[i], c[i]), max(c[i], r[i]) + 1});
	sort(t.begin(), t.end());
	int mx = -1;
	v.push_back({-1, -1});
	for(auto& x : t)
		if(x.second > mx)
			v.push_back({x.first, mx = x.second});
	
	n = v.size() - 1;
	k = min(k, n);
	
	memset(dp, 0x3f3f, sizeof dp);
	dp[0][0] = 0;
	
	for(int i = 1; i <= k; i++){
		for(int j = 1; j <= n; j++){
			dp[i][j] = dp[i - 1][j];
			for(int l = 1; l <= j; l++){
				int t1 = v[j].second - v[l].first;
				int t2 = max(0, v[l - 1].second - v[l].first);
				dp[i][j] = min(dp[i][j], dp[i - 1][l - 1] + t1 * t1 - t2 * t2);
			}
		}
	}
	return dp[k][n];
}

Compilation message (stderr)

aliens.cpp: In function 'long long int take_photos(int, int, int, std::vector<int>, std::vector<int>)':
aliens.cpp:11:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
     for(int i = 0; i < n; i++)
     ^~~
aliens.cpp:13:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  sort(t.begin(), t.end());
  ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 9 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40