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  1. #include <iostream>
  2. #include <cstdio>
  3. #include <cstring>
  4. using namespace std;
  5.  
  6. int main() {
  7. 	int n, l, r, a, b, arr[110], cnt, flag;
  8. 	scanf("%d", &n);
  9. 	scanf("%d%d", &a, &b);
  10. 	cnt=flag=0;
  11. 	memset(arr, 0, sizeof(arr));
  12. 	for(int i=a; i<b; i++) arr[i]++;
  13. 	for(int i=1; i<n; i++) {
  14. 		scanf("%d%d", &l, &r);
  15. 		for(int j=l; j<r; j++) arr[j]++;
  16. 	}
  17. 	for(int i=a; i<b; i++) {
  18. 		if(arr[i]==1) cnt++;
  19. 	}
  20. 	printf("%d\n", cnt);
  21. 	return 0;
  22. }
Success #stdin #stdout 0s 3344KB
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stdin
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https://ideone.com/WJ0C5y
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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