제출 #40908

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
40908		Hassoony	Poklon (COCI17_poklon)	C++14	0 / 140	364 ms	43088 KiB

poklon

#include<bits/stdc++.h>
#include<unordered_map>
using namespace std;
typedef long long ll;
typedef double D;
const ll inf=(1ll<<61);
const int mod=1e9+7;
const int MX=5e5+9;
const int SQ=200;
int n,q,a[MX],ans,res[MX];
pair<int,pair<int,int> >Q[MX];
unordered_map<int,int>cnt;
bool cmp(pair<int,pair<int,int> >A,pair<int,pair<int,int> >B){
    if((A.first/SQ)==(B.first/SQ)){
        return A.second.first<B.second.first;
    }
    return (A.first/SQ)<(B.first/SQ);
}
void add(int x){
    ans-=(cnt[x]==2);
    cnt[x]++;
    ans+=(cnt[x]==2);
}
void rem(int x){
    ans-=(cnt[x]==2);
    cnt[x]--;
    ans+=(cnt[x]==2);
}
int main(){
    cin>>n>>q;
    for(int i=1;i<=n;i++){
        scanf("%d",&a[i]);
    }
    for(int i=0;i<q;i++){
        scanf("%d%d",&Q[i].first,&Q[i].second.first);
        Q[i].second.second=i;
    }
    sort(Q,Q+q,cmp);
    int mol=1,mor=0;
    for(int i=0;i<q;i++){
        int L=Q[i].first,R=Q[i].second.first;
        while(mor<R){
            add(a[++mor]);
        }
        while(mor>R){
            rem(a[mor++]);
        }
        while(mol<L){
            rem(a[mol++]);
        }
        while(mol>L){
            add(a[++mol]);
        }
     //   cout<<L<<" "<<R<<" "<<Q[i].second.second<<endl;
        res[Q[i].second.second]=ans;
    }
    for(int i=0;i<q;i++)printf("%d\n",res[i]);
}

컴파일 시 표준 에러 (stderr) 메시지

poklon.cpp: In function 'int main()':
poklon.cpp:32:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&a[i]);
                          ^
poklon.cpp:35:53: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d",&Q[i].first,&Q[i].second.first);
                                                     ^

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