T了三个点求调,用的分块(不会线段树)
查看原帖
T了三个点求调,用的分块(不会线段树)
1116724
Chitose_楼主2024/1/21 13:15
#include<bits/stdc++.h>
using namespace std;
#define int long long 
const int maxn=320;
int n,x,y,k,m,mod,t,opt,p,q;
int a[maxn*maxn],l[maxn],r[maxn],cheng[maxn],jia[maxn],pos[maxn*maxn],sum[maxn];
inline int read(){
	int s = 0,f = 1;
	char ch = getchar();
	while(ch<'0'||ch>'9'){
		if(ch=='-')f = -1;
		ch = getchar();
	}
	while(ch>='0'&&ch<='9'){
		s = (s<<1)+(s<<3)+(ch^48);
		ch = getchar();
	}
	return s*f;
}
void updatecheng(int x,int y,int k){
	p=pos[x]; q=pos[y];
	if(p==q){
		sum[p]=0;
		for(int i=l[p];i<=r[p];i++){
			a[i]=(a[i]*cheng[p]+jia[p])%mod;
			if(i>=x && i<=y) a[i]=a[i]*k%mod;
			sum[p]=(sum[p]+a[i])%mod;
		}
		cheng[p]=1; jia[p]=0;
		return;
	}
	for(int i=p+1;i<=q-1;i++){
		sum[i]=sum[i]*k%mod;
		cheng[i]=cheng[i]*k%mod; jia[i]=jia[i]*k%mod;
	}
	sum[p]=0;
	for(int i=l[p];i<=r[p];i++){
		a[i]=(a[i]*cheng[p]+jia[p])%mod;
		if(i>=x) a[i]=a[i]*k%mod;
		sum[p]=(sum[p]+a[i])%mod;
	}
	cheng[p]=1; jia[p]=0;
	sum[q]=0;
	for(int i=l[q];i<=r[q];i++){
		a[i]=(a[i]*cheng[q]+jia[q])%mod;
		if(i<=y) a[i]=a[i]*k%mod;
		sum[q]=(sum[q]+a[i])%mod;
	}
	cheng[q]=1; jia[q]=0;
}
void updatejia(int x,int y,int k){
	p=pos[x]; q=pos[y];
	if(p==q){
		sum[p]=0;
		for(int i=l[p];i<=r[p];i++){
			a[i]=(a[i]*cheng[p]+jia[p])%mod;
			if(i>=x && i<=y) a[i]=(a[i]+k)%mod;
			sum[p]=(sum[p]+a[i])%mod;
		}
		cheng[p]=1; jia[p]=0;
		return;
	}
	for(int i=p+1;i<=q-1;i++){
		sum[i]=(sum[i]+(r[i]-l[i]+1)*k)%mod; jia[i]=(jia[i]+k)%mod;
	}
	sum[p]=0;
	for(int i=l[p];i<=r[p];i++){
		a[i]=(a[i]*cheng[p]+jia[p])%mod;
		if(i>=x) a[i]=(a[i]+k)%mod;
		sum[p]=(sum[p]+a[i])%mod;
	}
	cheng[p]=1; jia[p]=0;
	sum[q]=0;
	for(int i=l[q];i<=r[q];i++){
		a[i]=(a[i]*cheng[q]+jia[q])%mod;
		if(i<=y) a[i]=(a[i]+k)%mod;
		sum[q]=(sum[q]+a[i])%mod;
	}
	cheng[q]=1; jia[q]=0;
}
int query(int x,int y){
	int ans=0;
	p=pos[x]; q=pos[y];
	if(p==q){
		for(int i=x;i<=y;i++) ans=(ans+a[i]*cheng[p]+jia[p])%mod;
		return ans;
	}
	for(int i=p+1;i<=q-1;i++) ans=(ans+sum[i])%mod;
	for(int i=x;i<=r[p];i++) ans=(ans+a[i]*cheng[p]+jia[p])%mod;
	for(int i=l[q];i<=y;i++) ans=(ans+a[i]*cheng[q]+jia[q])%mod;
	return ans;
}
signed main(){
	n=read();
	m=read();
	mod=read();
	for(int i=1;i<=n;i++){
		a[i]=read();
	}
	t=sqrt(n);
	for(int i=1;i<=t;i++){
		l[i]=t*(i-1)+1; r[i]=t*i;					
	}
	if(r[t]<n){
		t++; l[t]=r[t-1]+1; r[t]=n;
	}
	for(int i=1;i<=t;i++){
		for(int j=l[i];j<=r[i];j++){
			pos[j]=i; sum[i]=(sum[i]+a[j])%mod;
		}
	}
	for(int i=1;i<=t;i++){
		cheng[i]=1;
	}
	for(int o=1;o<=m;o++){
		opt=read();
		if(opt==1){
			x=read(); y=read(); k=read();
			updatecheng(x,y,k);
		}
		if(opt==2){
			x=read(); y=read(); k=read();
			updatejia(x,y,k);
		}
		if(opt==3){
			x=read(); y=read(); 
			printf("%lld\n",query(x,y));
		}
	}
	return 0;
}
2024/1/21 13:15
加载中...