#include <stdio.h>
//課題B-1: 1からnまでの和を求めるコードを完成させてください
int sum(int n){
	int sum=0;
	for(int i=1;i<=n;i++){
	sum+=i;	
	}
return sum;
}
 
int main(void) {
	int a,b;
    a = 10;
    b = sum(a);
	return 0;
}
 
				I2luY2x1ZGUgPHN0ZGlvLmg+Ci8v6Kqy6aGMQi0xOiAx44GL44KJbuOBvuOBp+OBruWSjOOCkuaxguOCgeOCi+OCs+ODvOODieOCkuWujOaIkOOBleOBm+OBpuOBj+OBoOOBleOBhAppbnQgc3VtKGludCBuKXsKCWludCBzdW09MDsKCWZvcihpbnQgaT0xO2k8PW47aSsrKXsKCXN1bSs9aTsJCgl9CnJldHVybiBzdW07Cn0KCmludCBtYWluKHZvaWQpIHsKCWludCBhLGI7CiAgICBhID0gMTA7CiAgICBiID0gc3VtKGEpOwogICAgcHJpbnRmKCIx44GL44KJJWTjgb7jgafjga7lkozjga8lZCIsIGEsYiApOwoJcmV0dXJuIDA7Cn0K