Compilare: user.cpp: In function ‘void suffix_array()’: user.cpp:72:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<l[k].size();i++) ^ user.cpp: In function ‘void read()’: user.cpp:26:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n",s+1); ^ user.cpp:29:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&Q); ^ user.cpp:31:49: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&q[i].L,&q[i].K),q[i].ind=i; ^ user.cpp: In function ‘int main()’: user.cpp:159:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("klsecv.in","r",stdin); ^ user.cpp:160:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("klsecv.out","w",stdout); ^ user.cpp:162:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n",&T); ^