Run ID 作者 问题 语言 测评结果 Time Memory 代码长度 提交时间
148852 张法森 寻找第二小的数 C++ Compile Error 0 MS 0 KB 421 2026-03-01 19:28:19

Tests(0/0):

Code:

#include <iostream> #include <set> #include <vector> 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; // 移动到第二个元素 cout << *it << endl; } } return 0; }

Run Info:

Main.cc:1:21: warning: extra tokens at end of #include directive
 #include  #include  #include  using namespace std; int main() { int C; cin >> C; for (int i = 0; i < C; i++) { int n; cin >> n; set 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; // 移动到第二个元素 cout << *it << endl; } } return 0; }
                     ^
/usr/lib/gcc/x86_64-linux-gnu/5/../../../x86_64-linux-gnu/crt1.o: In function `_start':
(.text+0x20): undefined reference to `main'
collect2: error: ld returned 1 exit status