字符串

分割整行读入字符串
#include<bits/stdc++.h>
using namespace std;
int main()
{
    string s;
    getline(cin , s);
    stringstream ss(s);
    while(ss >> s)
    {
        int a = 0;
        for(int i=0; s[i]; i++) a = a*10 + s[i] - '0';
        cout<<a<<endl;
    }
    return 0;
}

string s,t;
cin >> s >> t;
for(auto v : {'a','b','c'})
{
	if(count(s.begin(),s.end(),v) != count(t.begin(),t.end(),v))
	{
		puts("NO");
	}
}


https://codeforces.com/contest/1759/problem/A
// find()
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

int main() {
    int _;
    cin >> _;
    while(_--) {
        string s;
        cin >> s;
        string res = "";
        for(int i=1; i<=50; i++) res += "Yes";
        if(res.find(s) != -1) cout<<"YES\n";
        else cout<<"NO\n";
    }
    return 0;
}

//substr
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;

int main() {
    int _;
    cin >> _;
    while(_--) {
        string s;
        cin >> s;
        string res = "";
        for(int i=1; i<=50; i++) res += "Yes";
        int len = s.size();
        bool ok = false;
        for(int i=0; i<3; i++) {
            if(res.substr(i,len) == s) {
                ok = true;
                break;
            }
        }
        if(ok) cout<<"YES\n";
        else  cout<<"NO\n";
    }
    return 0;
}

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