题解 | #小乐乐求和#
小乐乐求和
https://www.nowcoder.com/practice/ce0b2eacd3d04647831358c2876e44ff
#include <stdio.h> long long int Qh(long long int n) { if(n == 1) { return 1; } else { return (n + Qh(n - 1)); } } int main() { long long int a = 0; long long int b = 0; scanf("%lld",&a); b = Qh(a); printf("%lld",b); return 0; }