Submission #1024854

#	Time	Username	Problem	Language	Result	Execution time	Memory
1024854		sleepntsheep	Multiplication (BOI24_multiplication)	C11	100 / 100	1 ms	688 KiB

Main

#include <stdio.h>
long long mul(long long a, long long b) {
    if(!b)return 0;
    long long r=mul(a,b/2);
    if(b&1)return (r+r+a)%1000000007;
    return (r+r)%1000000007;
}
int main() {
    int n; long long a=1,b;
    scanf("%d",&n);while(n--)scanf("%lld",&b),a=mul(a,b);
    printf("%lld",a);

}

Compilation message (stderr)

Main.c: In function 'main':
Main.c:10:5: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d",&n);while(n--)scanf("%lld",&b),a=mul(a,b);
      |     ^~~~~~~~~~~~~~
Main.c:10:30: warning: ignoring return value of 'scanf' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d",&n);while(n--)scanf("%lld",&b),a=mul(a,b);
      |                              ^~~~~~~~~~~~~~~~

• Subtask 1: 35 / 35
• Subtask 2: 64 / 64
• Subtask 3: 1 / 1