Submission #1517331

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Source Code Expand

#define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>

int main(void){
    unsigned long n[1000001], a;
    scanf("%lu", &a);
    n[1] = 0;
    n[2] = 0;
    n[3] = 1;
    for(int i = 4; i <= a; i++){
        n[i] = (n[i - 1] + n[i - 2] + n[i - 3]) % 10007;
    }
    printf("%lu\n", n[a]);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lu", &a);
                     ^

Judge Result