题解 | #[NOIP2015]金币#
[NOIP2015]金币
https://www.nowcoder.com/practice/8f71f5670e6a45118d24d13868a2da9e
#include <iostream>
using namespace std;
int main() {
int k = 0;
int i = 0;
scanf("%d", &k);
int sum = 0;
int count = 0;
for (i = 1; i <= k; i++) {
int j = 0;
for (j = 1; j <= i; j++) {
sum += i;
count++;
if (count == k) {
printf("%d ", sum);
break;
}
}
}
}
// 64 位输出请用 printf("%lld")
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