Submission #597021

#	Time	Username	Problem	Language	Result	Execution time	Memory
597021		PiejanVDC	Horses (IOI15_horses)	C++17	Compilation error	0 ms	0 KiB

horses

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

#define int long long

vector<long long>x,y;

long long mod = (long long)1e9+7;

int init(int n, int X[], int Y[]) {
    for(int i = 0 ; i < n ; i++)
        x.push_back(X[i]), y.push_back(Y[i]);
    int last = -1;
    long long got = 1;
    long long ans = 0;
    long long curr = 0;
    long long prev = -1;

    while(last < n-1) {
        for(int i = last+1 ; i < n ; i++) {
             got *= x[i];
             got %= mod;
             if((y[i] * (got-1))%mod > prev%mod)
                last = i, prev = y[i] * (got-1);
            prev %= mod;
             // + case where you sell all of them
            ans = max(ans, (curr + y[i] * got)%mod);
            ans %= mod;
        }
        curr += prev;
        curr %= mod;
        prev = -1;
        got = 1;
    }

    ans = max(ans, curr);
    return ans;
}

int updateX(int p, int val) {
    int n = (int)x.size();
    x[p] = val;

    int last = -1;
    long long got = 1;
    long long ans = 0;
    long long curr = 0;
    long long prev = -1;

    while(last < n-1) {
        for(int i = last+1 ; i < n ; i++) {
             got *= x[i];
             got %= mod;
             if((y[i] * (got-1))%mod > prev%mod)
                last = i, prev = y[i] * (got-1);
            prev %= mod;
             // + case where you sell all of them
            ans = max(ans, (curr + y[i] * got)%mod);
            ans %= mod;
        }
        curr += prev;
        curr %= mod;
        prev = -1;
        got = 1;
    }

    ans = max(ans, curr);
    return ans;
}

int updateY(int p, int val) {
    int n = (int)x.size();
    y[p] = val;

    int last = -1;
    long long got = 1;
    long long ans = 0;
    long long curr = 0;
    long long prev = -1;

    while(last < n-1) {
        for(int i = last+1 ; i < n ; i++) {
             got *= x[i];
             got %= mod;
             if((y[i] * (got-1))%mod > prev%mod)
                last = i, prev = y[i] * (got-1);
            prev %= mod;
             // + case where you sell all of them
            ans = max(ans, (curr + y[i] * got)%mod);
            ans %= mod;
        }
        curr += prev;
        curr %= mod;
        prev = -1;
        got = 1;
    }

    ans = max(ans, curr);
    return ans;
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccIR5v2n.o: in function `main':
grader.c:(.text.startup+0xaa): undefined reference to `init(int, int*, int*)'
/usr/bin/ld: grader.c:(.text.startup+0x113): undefined reference to `updateX(int, int)'
/usr/bin/ld: grader.c:(.text.startup+0x16d): undefined reference to `updateY(int, int)'
collect2: error: ld returned 1 exit status