Compilare: main.cpp: In function 'int main()': main.cpp:25:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int w=0;w<poz[1].size();w++) ~^~~~~~~~~~~~~~ main.cpp:39:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(st==poz[i].size()){ant=2*n;break;} ~~^~~~~~~~~~~~~~~ main.cpp:11:13: warning: unused variable 'nr' [-Wunused-variable] int n,i,nr,cnt=0; ^~ main.cpp:9:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv.in","r",stdin); ^ main.cpp:10:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("secv.out","w",stdout); ^ main.cpp:12:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:16:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^