1180: 不容易系列
```cpp#includeusingnamespacestd;intf(intn){if(n==1)return1;return2*f(n-1)+1;}intmain(){intn;cin>>n;for(inti=1,x;i>x;cout
题解列表
1179: 上车人数
摘要：```cpp
#include
#include
using namespace std;
int main()
{
int a,n,m,x,b;
while(cin>>……
1178: 三进制小数
```cpp#include#includeusingnamespacestd;voidoutput_three(doublenum);intjinzhi=3;intmain(){intx,y;doublenum;while(scanf("%d/%d",
1247基础解法（Python）
解题思路:列表求解，用set()做数据清洗即可注意事项:注意题目格式，输入输出的要求参考代码:importsyscount=1lst_id=[]lst_num=[]forlineinsys.stdin:ifcount%2==0:lst_rec=[int(i)foriinline.split()]lst
1175: 金明的预算方案
```cpp#includeusingnamespacestd;intN,n,v[61],m[61],p[61],link[61][3],d[3200],a,b;intmain(){cin>>N>>n;N/=10;for(inti=1;i>v[i]>>m[i]>>p[i];v[i]/=10;if(p[
1174: 计算直线的交点数
摘要：```cpp
#include
using namespace std;
int main()
{
int n,s,i;
while(cin>>n)
{
……
1173: 计算球体积
```cpp#include#include#definePI3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679usingnamespacestd;
1172: 计算两点间的距离
```cpp#include#include#includeusingnamespacestd;intmain(){intx1,y1,x2,y2;doublelen=0;while(cin>>x1>>y1>>x2>>y2){len=sqrt((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2