#include <iostream>
#include <string>
using namespace std;
int a,b,c[] = {7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2},sum;
char d[] = {'1','0','X','9','8','7','6','5','4','3','2'};
string s;
bool l;
int main(){
	cin >> a;
	while(a--){
		cin >> s;
		l = true;
		for(int i = 0 ; i < 17 ; i++){
			if(!isdigit(s[i])){
				l = false;
				break;
			}
		}
		if(!l){
			cout << "False" << endl;
			continue;
		}
		sum = 0;
		for(int i = 0 ; i < 17 ; i++) sum += (s[i] - '0') * c[i];
		b = sum % 11;
		if(s[17] == d[b]) cout << "True" << endl;
		else cout << "False" << endl;
	}
	return 0;
}

#include<bits/stdc++.h> using namespace std; const int N = 1e5 + 10; const int INF = 0x3f3f3f3f; int a[] = {7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2}; char b[] = {'1','0','X','9','8','7','6','5','4','3','2'}; int main() { int n,ans =0; string s; cin >> n; getline(cin,s); int len=s.size(); for(int i = 0; i <len-1;i++) { ans +=(s[i]-'0') * a[i]; } ans%= 11; if(b[ans]==s[17]) { cout << "True" <<endl; } else{ cout << "False" << endl; } return 0; } #include<bits/stdc++.h> using namespace std; const int N = 1e5 + 10; const int INF = 0x3f3f3f3f; int a[] = {7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2}; char b[] = {'1','0','X','9','8','7','6','5','4','3','2'}; int main() { int n,ans =0; string s; cin >> n; getline(cin,s); int len=s.size(); for(int i = 0; i <len-1;i++) { ans +=(s[i]-'0') * a[i]; } ans%= 11; if(b[ans]==s[17]) { cout << "True" <<endl; } else{ cout << "False" << endl; } return 0; } 慢慢分行吧

#include <iostream>
#include <string>
using namespace std;
int a,b,c[] = {7,9,10,5,8,4,2,1,6,3,7,9,10,5,8,4,2},sum;
char d[] = {'1','0','X','9','8','7','6','5','4','3','2'};
string s;
bool l;
int main(){
	cin >> a;
	while(a--){
		cin >> s;
		l = true;
		for(int i = 0 ; i < 17 ; i++){
			if(!isdigit(s[i])){
				l = false;
				break;
			}
		}
		if(!l){
			cout << "True" << endl;
			continue;
		}
		sum = 0;
		for(int i = 0 ; i < 17 ; i++) sum += (s[i] - '0') * c[i];
		b = sum % 11;
		if(s[17] == d[b]) cout << "True"<< endl;
		else cout <<  "False" << endl;
	}
	return 0;
}