Submission #216909

#	Time	Username	Problem	Language	Result	Execution time	Memory
216909		kshitij_sodani	Horses (IOI15_horses)	C++17	0 / 100	481 ms	21880 KiB

horses

#include <iostream>
#include <bits/stdc++.h>
#include <horses.h>
using namespace std;
//typedef long long int int;
#define mp make_pair
#define pb push_back
#define a first
#define b second
#define endl "\n"
int mod=1000000007;
int tree[2000001];
int tree2[2000001];
int tree3[2000001];
int aa[500001];
int bb[500001];
int n;
int build3(int no,int l,int r){
	if(l==r){
		tree3[no]=aa[l];
	}
	else{
		int mid=(l+r)/2;
		build3(no*2+1,l,mid);
		build3(no*2+2,mid+1,r);
		tree3[no]=(tree3[no*2+1]*tree3[no*2+2])%mod;
	}
}
int query3(int no,int l,int r,int ac,int bc){
	if(l>=ac and r<=bc){
		return tree3[no];
	}
	if(r<ac or bc<l){
		return 1;
	}
	int mid=(l+r)/2;
	return (query3(no*2+1,l,mid,ac,bc)*query3(no*2+2,mid+1,r,ac,bc))%mod;
}
int update3(int no,int l,int r,int i,int val){
	if(l==r and l==i){
		tree3[no]=val;
	}
	else{
		int mid=(l+r)/2;
		if(i<=mid){
			update3(no*2+1,l,mid,i,val);
		}
		else{
			update3(no*2+2,mid+1,r,i,val);
		}
		tree3[no]=(tree3[no*2+1]*tree3[no*2+2])%mod;
	}
}
int build(int no,int l,int r){
	if(l==r){
		tree[no]=aa[l];
	}
	else{
		int mid=(l+r)/2;
		build(no*2+1,l,mid);
		build(no*2+2,mid+1,r);
		tree[no]=min((int)1000000001,tree[no*2+1]*tree[no*2+2]);
	}
}
int update(int no,int l,int r,int i,int val){
	if(l==r and l==i){
		tree[no]=val;
	}
	else{
		int mid=(l+r)/2;
		if(i<=mid){
			update(no*2+1,l,mid,i,val);
		}
		else{
			update(no*2+2,mid+1,r,i,val);
		}
		tree[no]=min((int)1000000001,tree[no*2+1]*tree[no*2+2]);
	}
}
int query(int no,int l,int r,int ac,int bc){
	if(l>=ac and r<=bc){
		return tree[no];
	}
	if(r<ac or bc<l){
		return 1;
	}
	int mid=(l+r)/2;
	return min((int)1000000001,query(no*2+1,l,mid,ac,bc)*query(no*2+2,mid+1,r,ac,bc));
}
int build2(int no,int l,int r){
	if(l==r){
		tree2[no]=l;
	//	cout<<no<<":"<<l<<endl;
	}
	else{
		int mid=(l+r)/2;
		build2(no*2+1,l,mid);
		build2(no*2+2,mid+1,r);
	//	cout<<l<<","<<r<<end;

		int xx=bb[tree2[no*2+1]]/bb[tree2[no*2+2]]+1;
		if(bb[tree2[no*2+1]]%bb[tree2[no*2+2]]==0){
			xx-=1;
		}
	//	cout<<tree2[no*2+1]+1<<","<<tree2[no*2+2]<<","<<query(0,0,n-1,tree2[no*2+1]+1,tree2[no*2+2])<<":"<<query(0,0,n-1,tree2[no*2+1]+1,tree2[no*2+2])<<endl;

		if(query(0,0,n-1,tree2[no*2+1]+1,tree2[no*2+2])>xx){
			tree2[no]=tree2[no*2+2];
		}
		else{
			tree2[no]=tree2[no*2+1];
		}
	//	cout<<l<<" "<<r<<" "<<no<<" "<<tree2[no]<<endl;
	}
}
int update2(int no,int l,int r,int i){
	if(l==r and l==i){
		tree2[no]=l;
	}
	else{
		int mid=(l+r)/2;
		if(i<=mid){
			update2(no*2+1,l,mid,i);
		}
		else{
			update2(no*2+2,mid+1,r,i);
		}
		int xx=bb[tree2[no*2+1]]/bb[tree2[no*2+2]]+1;
		if(bb[tree2[no*2+1]]%bb[tree2[no*2+2]]==0){
			xx-=1;
		}
		if(query(0,0,n-1,tree2[no*2+1]+1,tree2[no*2+2])>xx){
			tree2[no]=tree2[no*2+2];
		}
		else{
			tree2[no]=tree2[no*2+1];
		}
	}
}
int init(int nn,int x[],int y[]){
	n=nn;
	for(int i=0;i<n;i++){	
		aa[i]=x[i];
		bb[i]=y[i];
	}
	build(0,0,n-1);
	//cout<<1<<endl;
	build2(0,0,n-1);
	//cout<<1<<endl;
	build3(0,0,n-1);
	//cout<<1<<endl;
	return (int)((query3(0,0,n-1,0,tree2[0])*bb[tree2[0]])%mod);
}
int updateX(int pos,int val){
	update(0,0,n-1,pos-1,val);
	update3(0,0,n-1,pos-1,val);
	update2(0,0,n-1,pos-1);
	return (int)((query3(0,0,n-1,0,tree2[0])*bb[tree2[0]])%mod);
}
int updateY(int pos,int val){
	bb[pos-1]=val;
	update2(0,0,n-1,pos-1);
	return (int)((query3(0,0,n-1,0,tree2[0])*bb[tree2[0]])%mod);
}
/*int main(){
	int ac[3];
	int cc[3];
	ac[0]=2;ac[1]=1;ac[2]=3;
	cc[0]=1;cc[1]=2;cc[2]=2;
	cout<<init(3,ac,cc)<<endl;
	return 0;
}*/

Compilation message (stderr)

horses.cpp: In function 'int build3(int, int, int)':
horses.cpp:28:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
horses.cpp: In function 'int update3(int, int, int, int, int)':
horses.cpp:53:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
horses.cpp: In function 'int build(int, int, int)':
horses.cpp:64:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
horses.cpp: In function 'int update(int, int, int, int, int)':
horses.cpp:79:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
horses.cpp: In function 'int build2(int, int, int)':
horses.cpp:115:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^
horses.cpp: In function 'int update2(int, int, int, int)':
horses.cpp:139:1: warning: no return statement in function returning non-void [-Wreturn-type]
 }
 ^

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