Compilare: user.cpp: In function ‘int main()’: user.cpp:57:9: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if(n==1&v[1]==0){ ^ user.cpp:53:52: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.in","r",stdin); ^ user.cpp:54:54: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("infinitepatternmatching.out","w",stdout); ^ user.cpp:55:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ user.cpp:80:28: warning: ‘pos2’ may be used uninitialized in this function [-Wmaybe-uninitialized] long long res=bigs[pos2-pos1]; ^ user.cpp:81:20: warning: ‘pos1’ may be used uninitialized in this function [-Wmaybe-uninitialized] for(int i=pos1+1;i<=pos2;i++) ^ /tmp/ccym6Dua.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.