Compilare: user.cpp: In function ‘void init()’: user.cpp:18:28: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] pre[i] = pre[i-1] + (1<<i-1)*i; ^ user.cpp: In function ‘long long int getPosition(long long int)’: user.cpp:26:33: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] toReturn += biti*(x-(1<<biti-1)+1); ^ user.cpp: In function ‘void get(char*, long long int)’: user.cpp:46:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < strlen(t)/2; i++) ^ user.cpp: In function ‘void solve2()’: user.cpp:124:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = min(0, (int)strlen(aft)-(int)strlen(bef)); j < strlen(aft); j++) { ^ user.cpp:126:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k = j; k < strlen(aft) && ok; k++) ^ user.cpp:137:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(sol); i++) ^ user.cpp: In function ‘int main()’: user.cpp:148:51: 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:149:53: 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:151:9: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccP0zZNv.o: In function `main': user.cpp:(.text.startup+0x53): warning: the `gets' function is dangerous and should not be used.