2019秋招好未来笔试答案(含题目) 点赞有offer
第四题概率不会，大佬给我发下答案补上 ，要看题目的可以点这个链接
#include <bits/stdc++.h>
using namespace std;
int main() {
//freopen("../in.txt", "r", stdin);
string str;
cin >> str;
int i, len = str.length(), m, number, ans = 0, c1, c2;
for (i = 0, m = 0, c1 = 0, c2 = 0; i < len; i++) {
number = str[i] - '0';
//遇到3的情况直接加1
if (number % 3 == 0) {
ans++;
m = 0, c1 = 0, c2 = 0;
continue;
}
m += number;
if (number % 3 == 1)
c1++;
else
c2++;
//判断能不能有一个组合
if ((m > 0 && m % 3 == 0) || (c1 > 0 && c2 > 0)) {
ans++;
m = 0, c1 = 0, c2 = 0;
}
}
cout << ans << endl;
} 2.这题其实描述是有点不完整的，按照题目的意思，得到的ans可能会爆long long，但是我这么交上去过了
#include <bits/stdc++.h>
using namespace std;
#define ll long long
int main() {
//freopen("../in.txt", "r", stdin);
ll t,x,k,ans,i,j,a,lenX,lenK,lenA;
int posX[160],posK[160],posA[160];
cin>>t;
while (t--){
memset(posX,0, sizeof(posX));
cin>>x>>k;
i=0,ans=0;
while (x>0){
posX[i++]=x&1;
x=x>>1;
}
lenX=i;
i=0;
while (k>0){
posK[i++]=k&1;
k=k>>1;
}
lenK=i;
for(i=0,j=0,a=0;j<lenK;i++){
if(posX[i]==0)
posA[a++]=posK[j++];
else
posA[a++]=0;
}
lenA=a;
for(i=lenA-1;i>=0;i--){
ans=ans<<1;
ans=ans|posA[i];
}
cout<<ans<<endl;
}
} 3.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
int a[10]={0,1,2,3,4,5,6,7,8,9};
int pos[10],i,p[10];
set<string> v;
void Print(){
string s="";
for(i=0;i<10;i++){
if(p[i]==1)
s+=a[i]+'0';
// cout<<a[i];
}
v.insert(s);
// cout<<s<<endl;
}
int main() {
// freopen("../in.txt", "r", stdin);
for(i=0;i<10;i++)
cin>>pos[i];
int add = 0,tmp;
while (1){
int flag=0;
for(i=9;i>=0;i--){
if(p[i]==0){
flag=1;
}
}
if(flag==0){
break;
}
//打印
tmp=add++;
for(i=9;i>=0;i--){
p[i]=pos[i];
if(pos[i]==0){
p[i]=tmp&1;
tmp=tmp/2;
}
}
Print();
}
set<string>::iterator it;
for(it=v.begin();it!=v.end();it++){
cout<<*it<<endl;
}
} 4.
5.
#include <bits/stdc++.h>
using namespace std;
#define ll long long
int n, a[1005], Max;
int dp[1005];//dp[i]为前i个数的最大升序子段和
const int inf = 99999;
int main() {
//freopen("../in.txt", "r", stdin);
int i = 1, j, temp;
while (cin >> a[i++]);
n = i;
memset(dp, 0, sizeof(dp));
for (i = 1; i <= n; i++) {
temp = -inf;
for (j = 0; j < i; j++) {
if (a[j] < a[i])
temp = max(temp, dp[j]);//如果i前没有小于它的，temp就为0
} //且dp[i]也为它本身
dp[i] = temp + a[i];
}
temp = -inf;
for (i = 1; i <= n; i++)
if (dp[i] > temp)
temp = dp[i];
cout << temp << endl;
} 6.
#好未来##笔经##include <bits/stdc++.h>
using namespace std;
#define ll long long
void string_replace(string &strBig, const string &strsrc, const string &strdst) {
int pos = 0;
int srclen = strsrc.size();
int dstlen = strdst.size();
while ((pos = strBig.find(strsrc, pos)) != -1) {
strBig.replace(pos, srclen, strdst);
pos += dstlen;
}
}
int main() {
// freopen("../in.txt", "r", stdin);
string str, s, p;
getline(cin, str);
cin >> s >> p;
string_replace(str, s, p);
cout << str << endl;
} 
