Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
152130 gqj 寻找第二小的数 C++ Compile Error 0 MS 0 KB 391 2026-04-20 17:26:10

Tests(0/0):

Code:

#include <iostream> using namespace std; int main() { int C; cin >> C; for (int i = 0; i < C; i++) { int n; cin >> n; set<int> uniqueNumbers; for (int j = 0; j < n; j++) { int num; cin >> num; uniqueNumbers.insert(num); } if (uniqueNumbers.size() < 2) { cout << "NO" << endl; } else { auto it = uniqueNumbers.begin(); ++it;

Run Info:

Main.cc: In function 'int main()':
Main.cc:8:3: error: 'set' was not declared in this scope
   set uniqueNumbers;
   ^
Main.cc:8:7: error: expected primary-expression before 'int'
   set uniqueNumbers;
       ^
Main.cc:12:5: error: 'uniqueNumbers' was not declared in this scope
     uniqueNumbers.insert(num); 
     ^
Main.cc:13:11: error: 'uniqueNumbers' was not declared in this scope
     } if (uniqueNumbers.size() < 2) { 
           ^
Main.cc:17:8: error: expected '}' at end of input
    ++it; 
        ^
Main.cc:17:8: error: expected '}' at end of input
Main.cc:17:8: error: expected '}' at end of input