Submission #2180342

---

Source Code Expand

#include <stdio.h>
typedef long long int
int main(void){
	int a, b;
	int i;
	const int m = 1000000007;
	scanf("%d%d", &a, &b);

	int result = 0;
	int sum = 0;
	for (i = 1; i <= b; i++) {
		sum = (sum + i) % m;
		if (i >= a) result = (result + sum * i) % m;
	}

	printf("%d\n", result);
	return 0;
}

Submission Info

Compile Error

./Main.c:3:1: error: two or more data types in declaration specifiers
 int main(void){
 ^
./Main.c:3:5: error: function definition declared ‘typedef’
 int main(void){
     ^
./Main.c: In function ‘main’:
./Main.c:7:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &a, &b);
  ^