Submission #1114895

#	Time	Username	Problem	Language	Result	Execution time	Memory
1114895		mat_jur	Aliens (IOI16_aliens)	C++17	0 / 100	1 ms	516 KiB

aliens

#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#ifdef DEBUG
auto&operator<<(auto &o, pair<auto, auto> p) {o << "(" << p.first << ", " << p.second << ")"; return o;}
auto operator<<(auto&o,auto x)->decltype(x.end(),o){o<<"{"; for(auto e : x) o<<e<<", "; return o<<"}";}
#define debug(X) cerr << "["#X"]: " << X << '\n';
#else 
#define cerr if(0)cout
#define debug(X) ;
#endif
using ll = long long;
#define all(v) (v).begin(), (v).end()
#define ssize(x) int(x.size())
#define fi first
#define se second
#define mp make_pair
#define eb emplace_back

ll sq(int x) {
	return ll(x)*x;
}

long long take_photos(int n, int m, int k, std::vector<int> x, std::vector<int> y) {
	for (int i = 0; i < n; ++i)
		if (x[i] > y[i]) swap(x[i], y[i]);

	debug(x);
	debug(y);

	vector<int> nx, ny;

	vector<int> idx(n);
	iota(all(idx), 0);
	sort(all(idx), [&](int a, int b) {
		return mp(y[a], x[a]) > mp(y[b], x[b]);
	});

	debug(idx);

	int mx = m+1;
	for (int i : idx) {
		if (mx <= x[i]) continue;
		debug(i);
		debug(mx);
		debug(mp(x[i], y[i]));
		nx.eb(x[i]); ny.eb(y[i]);
		mx = x[i];
	}

	n = ssize(nx);
	x = nx; y = ny;
	reverse(all(x));
	reverse(all(y));

	debug(n);
	debug(x);
	debug(y);

	const ll inf = 1e15;
	debug(inf);
	vector<vector<ll>> dp(n+1, vector<ll>(k+1, inf));	
	dp[0][0] = 0;

	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= k; ++j) {
			for (int l = 0; l < i; ++l) {
				dp[i][j] = min(dp[i][j], dp[l][j-1] + sq(y[i-1] - x[l] + 1) - (l - 1 >= 0 ? sq(max(0, y[l-1] - x[l]+1)) : 0ll) );
			}
		}
	}

	debug(dp);

    return dp[n][k];
}

#ifdef LOCAL
int main() {
    int n, m, k;
    assert(3 == scanf("%d %d %d", &n, &m, &k));
    std::vector<int> r(n), c(n);
    for (int i = 0; i < n; i++) {
        assert(2 == scanf("%d %d", &r[i], &c[i]));
    }
    long long ans = take_photos(n, m, k, r, c);
    
    
    printf("%lld\n", ans);
}
#endif

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