Submission #791999

#	Time	Username	Problem	Language	Result	Execution time	Memory
791999		I_Love_EliskaM_	Aliens (IOI16_aliens)	C++14	Compilation error	0 ms	0 KiB

aliens

#include "aliens.h"
#include <bits/stdc++.h>
using namespace std;
#define forn(i,n) for(int i=0;i<n;++i)
#define pb push_back
#define all(x) x.begin(), x.end()
#define pi pair<int,int>
#define f first
#define s second
using ll = long long;
#define int ll 
const int inf=1e18;

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

struct line {
    int a,b;
    int f(int x) {
        return a*x+b;
    }
    line() {
        a=0, b=inf;
    }
    line(int x, int y) {
        a=x, b=y;
    }
};
const int sz=1<<20;
struct sgt {
    sgt *L, *R;
    line ln;
    sgt() {
        L=R=NULL; ln=line();
    }
    sgt(line n) {
        L=R=NULL; ln=n;
    }
    int it=0;
    void add(int l, int r, line n) {
        if (n.f(l)<=ln.f(l) && n.f(r)<=ln.f(r)) {
            ln=n; return;
        }
        if (n.f(l)>=ln.f(l) && n.f(r)>=ln.f(r)) {
            return;
        }
        if (r-l==1) return;
        int m=(l+r)>>1;
        if (!L) L=new sgt(ln);
        if (!R) R=new sgt(ln);
        L->add(l,m,n);
        R->add(m,r,n);
    }
    void add(line n) {
        it=0;
        add(0,sz,n);
        assert(it<=4*20);
    }
    int query(int l, int r, int x) {
        if (r<=x || l>x) return inf;
        int m=(l+r)>>1;
        int f=ln.f(x);
        int s=L?L->query(l,m,x):inf;
        int t=R?R->query(m,r,x):inf;
        return min({f,s,t});
    }
    int query(int x) {
        return query(0,sz,x);
    }
};

Compilation message (stderr)

/usr/bin/ld: /tmp/cciEJW81.o: in function `main':
grader.cpp:(.text.startup+0xf0): undefined reference to `take_photos(int, int, int, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status