Compilare: main.cpp: In function 'void dfs(int)': main.cpp:36:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= fii.size() ; ++i){ ~~^~~~~~~~~~~~~ main.cpp:45:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(grad <= fii.size()) d1[nod][grad] = r[l][fii.size()][grad]; ~~~~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("grarbore.in", "r", stdin); ^ main.cpp:62:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("grarbore.out", "w", stdout); ^ main.cpp:64:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ main.cpp:66:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ main.cpp:69:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^