Submission #409677

#	Time	Username	Problem	Language	Result	Execution time	Memory
409677		Batorgil952	Strange Device (APIO19_strange_device)	C++14	0 / 100	5051 ms	524292 KiB

strange_device

#include<bits/stdc++.h>
#define mp make_pair

using namespace std;

map< pair< int, int >, int > M;

int main(){
	long long n, q, p, i, j, x, y, a, b, s, P;
	
	scanf("%lld",&n);
	scanf("%lld",&q);
	scanf("%lld",&p);
	
	s=0;
	P=0;
	for(i=1; i<=n; i++){
		scanf("%lld",&x);
		scanf("%lld",&y);
		if(P==0){
			if(y-x+1>=p*q) s=p*q;
			else{
				for(j=x; j<=y; j++){
					a=(j+j/p)%q;
					b=j%p;
					M[mp(a, b)]++;
					if(M[mp(a, b)]==1) s++;
				}
			}
			if(s==p*q) P++;
		}
	}
	
	cout<<s<<endl;
	
	return 0;
}

Compilation message (stderr)

strange_device.cpp: In function 'int main()':
strange_device.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |  scanf("%lld",&n);
      |  ~~~~~^~~~~~~~~~~
strange_device.cpp:12:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  scanf("%lld",&q);
      |  ~~~~~^~~~~~~~~~~
strange_device.cpp:13:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  scanf("%lld",&p);
      |  ~~~~~^~~~~~~~~~~
strange_device.cpp:18:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |   scanf("%lld",&x);
      |   ~~~~~^~~~~~~~~~~
strange_device.cpp:19:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |   scanf("%lld",&y);
      |   ~~~~~^~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 5
• Subtask 3: 0 / 5
• Subtask 4: 0 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 20
• Subtask 7: 0 / 20
• Subtask 8: 0 / 30