Submission #40045

#	Time	Username	Problem	Language	Result	Execution time	Memory
40045		igzi	말 (IOI15_horses)	C++14	Compilation error	0 ms	0 KiB

horses

#include <bits/stdc++.h>
#include "horses.h"
#define maxN 500005
#define mod 1000000007

using namespace std;

struct segment{
long long a,b;};
segment seg[4*maxN];
vector <long long> x,y;

void build(int n,int l,int d){
if(l==d){
    seg[n].a=x[l];
    seg[n].b=x[l]*y[l]%mod;
}
else{
    int m=(l+d)/2;
    build(2*n,l,m);
    build(2*n+1,m+1,d);
    seg[n].a=(seg[2*n].a*seg[2*n+1].a)%mod;
    seg[n].b=(max(seg[2*n].b,seg[2*n+1].b*seg[2*n].a))%mod;
}
}
void updatex(int n,int l,int d,int p,long long v){
if(l==d){
    x[l]=v;
    seg[n].a=x[l];
    seg[n].b=x[l]*y[l]%mod;
}
else{
    int m=(l+d)/2;
    if(p<=m) updatex(2*n,l,m,p,v);
    else updatex(2*n+1,m+1,d,p,v);
    seg[n].a=(seg[2*n].a*seg[2*n+1].a)%mod;
    seg[n].b=(max(seg[2*n].b,seg[2*n+1].b*seg[2*n].a))%mod;
}
}
void updatey(int n,int l,int d,int p,long long v){
if(l==d){
    y[l]=v;
    seg[n].a=x[l];
    seg[n].b=x[l]*y[l]%mod;
}
else{
    int m=(l+d)/2;
    if(p<=m) updatey(2*n,l,m,p,v);
    else updatey(2*n+1,m+1,d,p,v);
    seg[n].a=(seg[2*n].a*seg[2*n+1].a)%mod;
    seg[n].b=(max(seg[2*n].b,seg[2*n+1].b*seg[2*n].a))%mod;
}
}

long long init(int n,long long a[],long long b[]){
int i;
for(i=0;i<n;i++){
    x.push_back(a[i]%mod);
    y.push_back(b[i]%mod);
}
build(1,0,n-1);
return seg[1].b;
}
long long updateX(int pos,long long val){
updatex(1,0,x.size()-1,pos,val);
return seg[1].b;
}
long long updateY(int pos,long long val){
updatey(1,0,y.size()-1,pos,val);
return seg[1].b;
}

Compilation message (stderr)

horses.cpp: In function 'long long int updateX(int, long long int)':
horses.cpp:65:31: warning: conversion to 'int' from 'std::vector<long long int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
 updatex(1,0,x.size()-1,pos,val);
                               ^
horses.cpp: In function 'long long int updateY(int, long long int)':
horses.cpp:69:31: warning: conversion to 'int' from 'std::vector<long long int>::size_type {aka long unsigned int}' may alter its value [-Wconversion]
 updatey(1,0,y.size()-1,pos,val);
                               ^
/tmp/ccJMcpe3.o: In function `main':
grader.c:(.text.startup+0x282): undefined reference to `init(int, int*, int*)'
grader.c:(.text.startup+0x75e): undefined reference to `updateX(int, int)'
grader.c:(.text.startup+0xae1): undefined reference to `updateY(int, int)'
collect2: error: ld returned 1 exit status