題解 | #[NOIP2015]金幣#
[NOIP2015]金幣
http://fangfengwang8.cn/practice/8f71f5670e6a45118d24d13868a2da9e
#include <stdio.h>
int print(int n) {
int count = 0;
int sum = 0;
for (int i = 1; count < n; i++) {
for (int j = 1; j <= i; j++) {
sum += i;
count++;
if (count == n)
break;
}
}
return sum;
}
int main() {
int a;
while (scanf("%d", &a) != EOF) { // 注意 while 處理多個 case
// 64 位輸出請用 printf("%lld")
int ret = print(a);
printf("%d\n", ret);
}
return 0;
}
