Submission #425438

#	Time	Username	Problem	Language	Result	Execution time	Memory
425438		errorgorn	Modsum (NOI12_modsum)	C++17	25 / 25	78 ms	332 KiB

modsum

#include <cstdio>
using namespace std;
int n,arr[1005][2],k;
void loop(int i,int v){
  if (i==n) {
    v=(v*v)%5;
    k+=(((v+2)*v)%5)+1;
  }
  else{
  for (int x=arr[i][0];x<=arr[i][1];x++){
    loop(i+1,(v+x)%5);
  }
  }
}
int main(){
  scanf("%d",&n);
  for (int x=0;x<n;x++){
    scanf("%d%d",&arr[x][0],&arr[x][1]);
  }
  loop(0,0);
  printf("%d",k);
}

Compilation message (stderr)

modsum.cpp: In function 'int main()':
modsum.cpp:16:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   scanf("%d",&n);
      |   ~~~~~^~~~~~~~~
modsum.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     scanf("%d%d",&arr[x][0],&arr[x][1]);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 5 / 5