Submission #856608

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Source Code Expand

#include <cstdio>
#include <vector>
#include <deque>
#include <algorithm>
#include <utility>
using namespace std;
vector<int> s;
typedef struct node{
	int pos,dist,p;
	vector<pair<int,int> > queries;
	vector<int> v;
};
node arr[110000];
int ans[110000]={};
deque<pair<int,int> >dq;
void dfs(int x,int lv){
	arr[x].dist=lv;
	for(auto &it:arr[x].v){
		dfs(it,lv+1);
	}
}
void dfs2(int x){
	s.push_back(x);
	for(auto &it: arr[x].queries){
		ans[it.second]=arr[x].dist-arr[it.first].dist+(arr[s[arr[it.first].dist]].pos<arr[it.first].pos);
	}
	for(auto &it:arr[x].v){
		dfs2(it);
	}
	s.pop_back();
}
int main(){
	int n,l;
	scanf("%d",&n);
	for(int i=1;i<=n;i++){
		scanf("%d",&arr[i].pos);
	}
	scanf("%d",&l);
	for(int i=1;i<=n;i++){
		dq.push_back({arr[i].pos,i});
		while(arr[i].pos>dq.front().first+l){
			arr[dq.front().second].p=i-1;
			dq.pop_front();
		}
	}
	while(!dq.empty()){
		arr[dq.front().second].p=n;
		dq.pop_front();
	}
	for(int i=1;i<n;i++){
		arr[arr[i].p].v.push_back(i);
	}
	int q,a,b;
	scanf("%d",&q);
	for(int i=1;i<=q;i++){
		scanf("%d %d",&a,&b);
		if(a>b)swap(a,b);
		arr[a].queries.push_back({b,i});
	}
	dfs(n,0);
	dfs2(n);
	for(int i=1;i<=q;i++){
		printf("%d\n",ans[i]);
	}
}

Submission Info

Compile Error

./Main.cpp:12:1: warning: ‘typedef’ was ignored in this declaration
 };
 ^
./Main.cpp: In function ‘int main()’:
./Main.cpp:34:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:36:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&arr[i].pos);
                          ^
./Main.cpp:38:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&l);
                ^
./Main.cpp:54:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&q);
                ^
./Main.cpp:56:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d",&a,&b...

Judge Result