Compilare: user.cpp: In function ‘int main()’: user.cpp:49:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int ind = 0; ind < I.size(); ind++){ ^ user.cpp:51:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(x == y && ins[x] == 1 && ind != I.size() - 1) ^ user.cpp:23:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &n, &m); ^ user.cpp:27:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d", &x, &y); ^