제출 #40049

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
40049		igzi	말 (IOI15_horses)	C++14	17 / 100	78 ms	47600 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))%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))%mod;
}
}
void updatey(int n,int l,int d,int p,long long v){
if(l==d){
    y[l]=v;
    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))%mod;
}
}

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

컴파일 시 표준 에러 (stderr) 메시지

horses.cpp: In function 'int updateX(int, int)':
horses.cpp:67:43: 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,(long long) val);
                                           ^
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:73:43: 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,(long long) val);
                                           ^

• Subtask 1: 17 / 17
• Subtask 2: 0 / 17
• Subtask 3: 0 / 20
• Subtask 4: 0 / 23
• Subtask 5: 0 / 23