Compilare: main.cpp: In function 'int main()': main.cpp:26:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i].size()>max1) ~~~~~~~~~~~^~~~~ main.cpp:29:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (v[i].size()==max1 && v[i]<x) ~~~~~~~~~~~^~~~~~ main.cpp:37:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[i].size();j++) { ~^~~~~~~~~~~~ main.cpp:45:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<v[k1].size();j++) { ~^~~~~~~~~~~~~ main.cpp:35:25: warning: unused variable 'k2' [-Wunused-variable] int ok=0,k1,k2,ok2; ^~ main.cpp:17:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.in","r",stdin); ^ main.cpp:18:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.out","w",stdout); ^ main.cpp:19:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d ", &p, &n); ^