题解 | #[NOIP2015]金币#
[NOIP2015]金币
https://www.nowcoder.com/practice/8f71f5670e6a45118d24d13868a2da9e
#include <stdio.h>
int main() {
int a;
scanf("%d", &a);
int sum = 0;
int n = 1;
while (a) {
for (int i = 1; i <= n; i++) {
if (a == 0)
break;
sum += n;
a--;
}
n++;
}
printf("%d\n", sum);
return 0;
}
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