Cow heist

input/code.cpp:5:6: error: 'list' in namespace 'std' does not name a template type
    5 | std::list<int> sums(std::list<int> X, int target) {
      |      ^~~~
input/code.cpp:4:1: note: 'std::list' is defined in header '<list>'; did you forget to '#include <list>'?
    3 | #include <queue>
  +++ |+#include <list>
    4 | 
input/code.cpp:11:43: error: 'std::list' has not been declared
   11 | bool is_constructible_by_sum(int nb, std::list<int> X, int offset) {
      |                                           ^~~~
input/code.cpp:11:47: error: expected ',' or '...' before '<' token
   11 | bool is_constructible_by_sum(int nb, std::list<int> X, int offset) {
      |                                               ^
input/code.cpp: In function 'bool is_constructible_by_sum(int, int)':
input/code.cpp:12:9: error: 'X' was not declared in this scope
   12 |     if (X.size() == 1) {
      |         ^
input/code.cpp:15:15: error: 'list' is not a member of 'std'
   15 |     for (std::list<int>::i...

// Online C++ compiler to run C++ program online
#include <iostream>
#include <queue>

std::list<int> sums(std::list<int> X, int target) {
    if (X.size == 1) return X[0];
    
    for ()
}

bool is_constructible_by_sum(int nb, std::list<int> X, int offset) {
    if (X.size() == 1) {
        return X[0] == nb;
    }
    for (std::list<int>::iterator it = X.begin(); it != X.end(); ++it) {
        
    }
}

int main(int argc, char *argv[]) {
    int n = atoi(argv[1]);
    int c[n];
    for (int i = 0; i < n; ++i) {
        c[i] = atoi(argv[i+2]);
    }
    
    std::map<int, int> ships;  // <cows capacity, number of ships>
    
    int X[30];
    int sum = 0;
    int l = 0;
    
    std::list<int> X_list (std::begin(X), std::end(X));
    
    for (int i = 1; i < n; i++) {
        cows = c[i];
        if (cows > sum) {
            X[l] = cows - sum;
            l++;
        } else {
            
        }
        
    }
    
    

    return 0;
}