Compilare: main.cpp: In function 'void DFS(int, int)': main.cpp:51:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pathSums[index].empty() || pos == pathSums[index].size()) { ~~~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:60:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos < pathSums[index].size()) { ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:71:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (pos < pathSums[index].size()) { ~~~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:34: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &n, &sum); ^ main.cpp:86:36: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d %d", &x, &y); ^