Submission #761782

#	Time	Username	Problem	Language	Result	Execution time	Memory
761782		Dan4Life	Aliens (IOI16_aliens)	C++17	Compilation error	0 ms	0 KiB

aliens

//#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz(a) (int)a.size()
using ll = long long;
using ar = array<int,2>;
vector<ar> v,w;

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

ll cost(int i, int j){
	ll x = max(0,v[i][1]-v[j][0]+1); if(i==0) x=0;
	return sq(v[j][1]-v[i][0]+1)-sq(x);
}
 
ll take_photos(int n, int m, int k, vector<int> r, vector<int> c) {
	for(int i = 0; i < n; i++)
		if(r[i]>c[i]) r[i]=m-r[i]-1,c[i]=m-c[i]-1;
	for(int i = 0; i < n; i++) w.pb({r[i],c[i]});
	sort(begin(w),end(w),[&](ar a, ar b){
		if(a[1]!=b[1]) return a[1]<b[1];
		return a[0]<b[0];
	}); 
	int mn=m;
	for(int i = n-1; i >=0; i--){
		if(mn>w[i][0]) v.pb(w[i]);
		mn = min(mn,w[i][0]);
	}
	sort(begin(v),end(v),[&](ar a, ar b){
		if(a[1]!=b[1]) return a[1]<b[1];
		return a[0]<b[0];
	});
	n = sz(v); ll dp[k+1][n]; memset(dp,63,sizeof(dp));
	for(int i = 0; i < n; i++) dp[1][i] = cost(0,i);
	for(int j = 2; j <= k; j++){
		for(int i = 0; i < n; i++){
			dp[j][i] = dp[j-1][i];
			for(int x = 0; x < i; x++){
				dp[j][i] = min(dp[j][i], dp[j-1][x]+cost(x+1,i));
			}
		}
	}
	return dp[k][n-1];
}

int main(){
    int n, m, k;
    assert(3 == scanf("%d %d %d", &n, &m, &k));
    vector<int> r(n), c(n);
    for (int i = 0; i < n; i++)
        assert(2 == scanf("%d %d", &r[i], &c[i]));
    printf("%lld\n", take_photos(n, m, k, r, c));
    return 0;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccQLlA32.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/cczaZHZY.o:aliens.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status