Submission #82256

#	Time	Username	Problem	Language	Result	Execution time	Memory
82256		farukkastamonuda	Horses (IOI15_horses)	C++14	17 / 100	108 ms	21644 KiB

horses

#include "horses.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define lo long long 
#define inf 10000000000000009
#define md 1000000007
#define li 500005
#define mp make_pair
//#define lo int long long 
#define pb push_back
#define mid (start+end)/2
using namespace std;
lo int n,A1[li],B1[li],A[li],B[li];
lo int tree[li*4],lazy[li*4];
lo pw(lo a,lo b){
	if(b==0) return 1;
	if(b==1) return a%md;
	lo t=pw(a,b/2);
	t=(t%md*t%md)%md;
	if(b%2==1) t=(t%md*a%md)%md;
	return t%md;
}
void build(int node,int start,int end){
	if(start==end){
		tree[node]=(A[start]%md*B[start]%md)%md;
		return ;
	}
	build(node*2,start,mid);build(node*2+1,mid+1,end);
	tree[node]=max((lo)tree[node*2]%md,(lo)tree[node*2+1]%md);
}
void push(int node,int start,int end){
	if(lazy[node]==0) return ;
	tree[node]=(lo)((lo)tree[node]%md*pw(lazy[node],end-start+1)%md)%md;
	if(start!=end){
		if(lazy[node*2]==0) lazy[node*2]=(lo)lazy[node]%md;
		else lazy[node*2]=(lo)((lo)lazy[node*2]%md*(lo)lazy[node]%md)%md;
		if(lazy[node*2+1]==0) lazy[node*2+1]=(lo)lazy[node]%md;
		else lazy[node*2+1]=(lo)((lo)lazy[node*2+1]%md*(lo)lazy[node]%md)%md;
	}
	lazy[node]=0;
}
lo query(int node,int start,int end,int l,int r){
	if(start>end || start>r || end<l) return -inf;
	push(node,start,end);
	if(start>=l && end<=r) return (lo)tree[node]%md;
	lo q1=(lo)query(node*2,start,mid,l,r)%md;
	lo q2=(lo)query(node*2+1,mid+1,end,l,r)%md;
	return max(q1,q2);
}
int init(int N,int X[],int Y[]){
	n=N;
	for(int i=0;i<n;i++) A[i+1]=X[i];
	for(int i=0;i<n;i++) B[i+1]=Y[i];
	for(int i=1;i<=n;i++){
		A[i]=(A[i]%md*(i!=1?A[i-1]:1)%md)%md;
	}
	build(1,1,n);
	int bas=(lo)query(1,1,n,1,n)%md;
	return bas;
}
void update(int node,int start,int end,int l,int r,lo val){
	push(node,start,end);
	if(start>end || start>r || end<l) return ;
	if(start>=l && end<=r){
		if(lazy[node]==0) lazy[node]=val;
		else lazy[node]=(lo)((lo)lazy[node]%md*(lo)val%md)%md;
		push(node,start,end);
		return ;
	}
	update(node*2,start,mid,l,r,val);update(node*2+1,mid+1,end,l,r,val);
	tree[node]=max(tree[node*2],tree[node*2+1]);
}
int updateX(int pos,int val){
	//A[pos+1]=val;
	pos++;
	lo ggwp=val,htht=A[pos];
	update(1,1,n,pos,n,ggwp/htht);
	int bas=(lo )query(1,1,n,1,n)%md;
	return bas;
}
int updateY(int pos,int val){
	pos++;
	lo ggwp=val,htht=B[pos];
	update(1,1,n,pos,pos,ggwp/htht);
	int bas=(lo)query(1,1,n,1,n)%md;
	return bas;
 }
//~ int main(){
	//~ scanf("%lld",&n);
	//~ for(int i=0;i<n;i++) scanf("%d",&A1[i]);
	//~ for(int i=0;i<n;i++) scanf("%d",&B1[i]);
	//~ int ty=init(n,A1,B1);
	//~ ty=updateY(1,2);
	//~ printf("%d\n",ty);
	//~ return 0;
//~ }

Compilation message (stderr)

horses.cpp: In function 'int init(int, int*, int*)':
horses.cpp:58:13: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  build(1,1,n);
             ^
horses.cpp:59:29: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int bas=(lo)query(1,1,n,1,n)%md;
                             ^
horses.cpp:59:29: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
horses.cpp:59:30: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int bas=(lo)query(1,1,n,1,n)%md;
                              ^
horses.cpp: In function 'int updateX(int, int)':
horses.cpp:78:30: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  update(1,1,n,pos,n,ggwp/htht);
                              ^
horses.cpp:78:30: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
horses.cpp:79:30: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int bas=(lo )query(1,1,n,1,n)%md;
                              ^
horses.cpp:79:30: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
horses.cpp:79:31: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int bas=(lo )query(1,1,n,1,n)%md;
                               ^
horses.cpp: In function 'int updateY(int, int)':
horses.cpp:85:32: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  update(1,1,n,pos,pos,ggwp/htht);
                                ^
horses.cpp:86:29: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int bas=(lo)query(1,1,n,1,n)%md;
                             ^
horses.cpp:86:29: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
horses.cpp:86:30: warning: conversion to 'int' from 'long long int' may alter its value [-Wconversion]
  int bas=(lo)query(1,1,n,1,n)%md;
                              ^

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