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Time limit: 1 s space limit: 128000 KB title level: Silver

Title Description Description

Give you a real number, no more than 50 digits after the decimal point, please keep to the decimal point after n bit (rounding!!!) )

Enter a description input Description

First line, a real number, no more than 50 digits after the decimal point

Second row, reserved to n decimal places

outputs description output Description

A real number, a fractional number that has been retained

sample input to sample

5.198273258723587235728

3

Sample output Sample outputs

5.198

data size & Hint

Not too big, just pay attention, remember it's rounding up

Portal Point This expansion  

This problem is very simple, issued just to take a bubble, prove that I still continue to walk this road.

Maybe it's been kicked out in years.

#include <iostream>#include<cstring>#include<cstdio>using namespacestd;Chars[14451245];intI,n;intMain () {intC=0;    Gets (s); CIN>>N;  for(i=0; I<strlen (s); + +i) {if(s[i]=='.') {C=i;  Break; }    }    if(s[c+n+1]>='5'&&s[c+n+1]<='9') S[c+n]++; intk=0;  while(s[c+n-k]>'9') {S[c+n]='0'; S[c+n-1]++; K++; }     for(i=0; i<c+n+1;++i) cout<<s[i];}

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Codevs 2894 reserved Decimals