Compilare: main.cpp: In function 'int solveNod(Elem)': main.cpp:109:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < g[a.ind].size(); k ++) { ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'void citire()': main.cpp:72:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:76:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &vals[i]); ^ main.cpp:85:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ main.cpp: In function 'int main()': main.cpp:164:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("countfefete.in", "r", stdin); ^ main.cpp:165:44: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("countfefete.out", "w", stdout); ^