Submission #68371

#	Time	Username	Problem	Language	Result	Execution time	Memory
68371		Kerim	Sterilizing Spray (JOI15_sterilizing)	C++17	100 / 100	443 ms	30128 KiB

sterilizing

#include "bits/stdc++.h"
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x)  cerr<< #x <<" = "<< x<<endl;
using namespace std;

typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
ll sum[MAXN<<2];
int mx[MAXN<<2],arr[MAXN],k;
void build(int nd,int x,int y){
	if(x==y){
		sum[nd]=mx[nd]=arr[x];
		return;
	}
	int mid=(x+y)>>1;
	build(nd<<1,x,mid);
	build(nd<<1|1,mid+1,y);
	sum[nd]=sum[nd<<1]+sum[nd<<1|1];
	mx[nd]=max(mx[nd<<1],mx[nd<<1|1]);
}
void upd(int p,int v,int nd,int x,int y){
	if(x==y){
		sum[nd]=mx[nd]=v;
		return;
	}
	int mid=(x+y)>>1;
	if(p<=mid)
		upd(p,v,nd<<1,x,mid);
	else	
		upd(p,v,nd<<1|1,mid+1,y);
	sum[nd]=sum[nd<<1]+sum[nd<<1|1];
	mx[nd]=max(mx[nd<<1],mx[nd<<1|1]);
}
void inc(int l,int r,int nd,int x,int y){
	if(l>y or x>r or !mx[nd])
		return;
	if(x==y){
		sum[nd]/=k;
		mx[nd]/=k;
		return;
	}	
	int mid=(x+y)>>1;
	inc(l,r,nd<<1,x,mid);
	inc(l,r,nd<<1|1,mid+1,y);
	sum[nd]=sum[nd<<1]+sum[nd<<1|1];
	mx[nd]=max(mx[nd<<1],mx[nd<<1|1]);
}
ll tap(int l,int r,int nd,int x,int y){
	if(l>y or x>r)
		return 0;
	if(l<=x and y<=r)
		return sum[nd];
	int mid=(x+y)>>1;
	return tap(l,r,nd<<1,x,mid)+tap(l,r,nd<<1|1,mid+1,y);	
}
int main(){
    //~ freopen("file.in", "r", stdin);
    int n,q;
    scanf("%d%d%d",&n,&q,&k);
    for(int i=1;i<=n;i++)
		scanf("%d",arr+i);
	build(1,1,n);
	while(q--){
		int t,l,r;
		scanf("%d%d%d",&t,&l,&r);
		if(t==1)
			upd(l,r,1,1,n);
		else if(t==2){
			if(k!=1)
				inc(l,r,1,1,n);
		}
		else
			printf("%lld\n",tap(l,r,1,1,n));
	}	
	return 0;
}

Compilation message (stderr)

sterilizing.cpp: In function 'int main()':
sterilizing.cpp:71:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d%d",&n,&q,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~~
sterilizing.cpp:73:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",arr+i);
   ~~~~~^~~~~~~~~~~~
sterilizing.cpp:77:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d",&t,&l,&r);
   ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 75 / 75