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归类了 OJ，整理了一下

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Fengyi Chen
2024-02-15 22:38:30 +08:00
parent 76c1ecea65
commit 8dbc0861b2
231 changed files with 0 additions and 0 deletions
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24
XSM OJ 重庆小码王集团OJ/数1的个数.cpp Normal file
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#include <iostream>
#include <cmath>
#include <cstdlib>
#include <cstdio>
#include <iomanip>
using namespace std;
int main(){
int a;
int b=0;
cin >>a;
for(int i=1;i<=a;i++){
int j=i;
while(j){
if(j%10==1){
b++;
}
j/=10;
}
}
cout <<b;
return 0;
}