#include<stdio.h> int hanshu(int x); int hanshu(int x) { int y; if(x<1) y=x; else if(x>=1&&x<10) y=2*x-1; else if(x>=10) y=3*x-11; return y; } int main(void) { int x, y; scanf("%d",&x); y=hanshu(x); printf("%d\n",y); } |
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