Compilare: user.cpp: In function ‘int main()’: user.cpp:40:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < g[i].size(); j++) ^ user.cpp:49:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < g[x].size(); j++) ^ user.cpp:71:51: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < g[x].size(); j++) ^ user.cpp:15:25: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &t); ^ user.cpp:20:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &n, &m); ^ user.cpp:32:39: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &x, &y); ^