Compilare: user.cpp: In function ‘void bfs(int, int)’: user.cpp:40:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < con[crt.pos].size(); i++) { ^ user.cpp: In function ‘void dfs(int, int)’: user.cpp:63:136: warning: suggest parentheses around comparison in operand of ‘==’ [-Wparentheses] } else if(i <= K && !(stare & (1 << (i - 1))) && (viz2[i][stare | (1 << (i - 1))] == 0 || viz2[i][stare | (1 << (i - 1))] == 0 > viz2[pos][stare] + d[pos][i])) { ^ user.cpp: In function ‘int main()’: user.cpp:98:40: warning: suggest parentheses around ‘-’ inside ‘<<’ [-Wparentheses] printf("%d\n", viz2[K + 1][(1 << K - 1)]); ^ user.cpp:73:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:74:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ubuntzei.in", "r", stdin); ^ user.cpp:75:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ubuntzei.out", "w", stdout); ^ user.cpp:76:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &N, &M); ^ user.cpp:77:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &K); ^ user.cpp:79:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &pos[i]); ^ user.cpp:85:38: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &a, &b, &c); ^