题解 | #等差数列#
等差数列
http://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
int main() { int n=0; scanf("%d",&n); int mid=2; int tmp=0; while(n>0) { tmp=tmp+mid; mid=mid+3; n--; } printf("%d",tmp);
return 0;
}
等差数列
http://www.nowcoder.com/practice/f792cb014ed0474fb8f53389e7d9c07f
int main() { int n=0; scanf("%d",&n); int mid=2; int tmp=0; while(n>0) { tmp=tmp+mid; mid=mid+3; n--; } printf("%d",tmp);
return 0;
}
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