Compilare: main.cpp: In function 'int substrOfSum(std::vector<int>, int, int)': main.cpp:32:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = firstIndex; i < v.size(); i++) { ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:79:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (index < trav.size()) { ~~~~~~^~~~~~~~~~~~~ main.cpp:68:6: warning: unused variable 'currentNode' [-Wunused-variable] int currentNode = 1; ^~~~~~~~~~~ main.cpp:56:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &nodesNo, &sum); ^ main.cpp:62:29: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &p, &v); ^