Submission #136948

#	Time	Username	Problem	Language	Result	Execution time	Memory
136948		dnass	Poklon (COCI17_poklon)	C++14	56 / 140	374 ms	632 KiB

poklon

#include <bits/stdc++.h>
using namespace std;

int n, q;
int a[5010];

int main(){
	scanf("%d %d", &n, &q);
	for(int i=0;i<n;i++) scanf("%d", &a[i]);
	while(q--){
		int l, r; scanf("%d %d", &l, &r);
		--l; --r;
		vector<int> x;
		for(int i=l;i<=r;i++) x.push_back(a[i]);
		sort(x.begin(), x.end());
		int beg = 0, ans = 0;
		for(int i=1;i<=(int) x.size();i++){
			if(i==(int) x.size()||x[i]!=x[i-1]){
				if(i-beg==2) ans++;
				beg = i;
			}
		}
		printf("%d\n", ans);
	}
	return 0;
}

Compilation message (stderr)

poklon.cpp: In function 'int main()':
poklon.cpp:8:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &q);
  ~~~~~^~~~~~~~~~~~~~~~~
poklon.cpp:9:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=0;i<n;i++) scanf("%d", &a[i]);
                       ~~~~~^~~~~~~~~~~~~
poklon.cpp:11:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   int l, r; scanf("%d %d", &l, &r);
             ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 56 / 140