Compilare: main.cpp: In function 'int lcp(int, int)': main.cpp:45:11: warning: unused variable 'i1' [-Wunused-variable] int l,i1,j1; ^~ main.cpp:45:14: warning: unused variable 'j1' [-Wunused-variable] int l,i1,j1; ^~ main.cpp: In function 'void dfs(int, int)': main.cpp:60:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<g[nod].size(); i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] { freopen("parb2.in", "r", stdin); ^ main.cpp:68:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("parb2.out", "w", stdout); ^ main.cpp:71:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d\n", &n, &q); ^ main.cpp:73:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d %c", &x, &y, &z); ^ main.cpp:103:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ main.cpp:127:29: warning: 'lastt' may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%d\n", lastt-last+1); ~~~~~^~~~~ main.cpp:127:29: warning: 'last' may be used uninitialized in this function [-Wmaybe-uninitialized]