Compilare: main.cpp: In function 'll solve(int)': main.cpp:36:30: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if (state & op[0][i] == state || state & op[0][i] == 0) continue; ~~~~~~~~~^~~~~~~~ main.cpp:36:59: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses] if (state & op[0][i] == state || state & op[0][i] == 0) continue; ~~~~~~~~~^~~~ main.cpp: In function 'int main()': main.cpp:73:38: warning: format '%d' expects argument of type 'int', but argument 2 has type 'll {aka long long int}' [-Wformat=] printf("%d\n", solve(pows[n] - 1)); ^ main.cpp:43:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.in", "r", stdin); ^ main.cpp:44:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sobo.out", "w", stdout); ^ main.cpp:47:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &l); ^ main.cpp:50:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%s\n", sobo); ^ main.cpp:63:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &cost[i]); ^