Submission #1927287

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Source Code Expand

#include<cstdio>
#include<vector>
#include<algorithm>
#include<string>
#include<iostream>
#define INF 10000000;
using namespace std;

int rui[100000]={};
int sosu[100000]={};
int l[100000],r[100000];
int q;
int nummax=0;

void likegene(int);
bool sosucheck(int);

void likegene(int nummax){
	int top=nummax/2;
	for(int lp=1;lp<=nummax;lp+=2){
		if(sosucheck(lp)==true && sosucheck((lp+1)/2) ==true){
			rui[lp/2]++;
			//printf("%d is 2017lik\n",lp);
		}
		else{
			//printf("%d is not 2017like\n",lp);
		}
		
		rui[lp/2]+=rui[lp/2-1];
	}
}

bool sosucheck(int num){
	if(num==1) return false;
	if(sosu[num]==2){
		return false;
	}else if(sosu[num]==1){
		return true;
	}else{
		for(int lp=2;lp<num;lp++){
			if(num%lp==0){
				sosu[num]=2;
				return false;
			}
		}
		sosu[num]=1;
		return true;
	}
}

void ruiprint(void){
	for(int lp=0;lp<=nummax/2;lp++){
		printf("%d\n",rui[lp]);
	}
}

int main(void){
	cin >>q;
	for(int lp=0;lp<q;lp++){
		scanf("%d%d",&l[lp],&r[lp]);
		if(nummax<r[lp]){
			nummax=r[lp];
		}
	}
	
	likegene(nummax);
	//ruiprint();
	
	for(int lp=0;lp<q;lp++){
		int left=l[lp]/2;
		int right=r[lp]/2;
		//printf("%d %d\n",left,right);
		if(left==0){
			printf("%d\n",rui[right]);
		}else{
			printf("%d\n",rui[right]-rui[left-1]);
		}
	}
	
	
	
	
	
	return 0;
		
	
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:60:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&l[lp],&r[lp]);
                              ^

Judge Result