Compilare: user.cpp: In function ‘int main()’: user.cpp:133:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[j].size(); i++) { ^ user.cpp:137:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < g[j].size(); i++) { ^ user.cpp:82:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &n, &m, &k); ^ user.cpp:92:70: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d%d", &trare[i].a, &trare[i].b, &trare[i].val); ^ user.cpp:159:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &a, &b); ^