Compilare: user.cpp: In function ‘int main()’: user.cpp:63:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < dist[q.front().p].size(); i++) { ^ user.cpp:67:25: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if(f[tmp.p] && (tmp.d < dab[inv[tmp.s]][inv[tmp.p]]) || (dab[inv[tmp.s]][inv[tmp.p]] == 0)) { ^ user.cpp:71:33: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] } else if(!f[tmp.p] && !viz[inv[tmp.s]][tmp.p] || viz[inv[tmp.s]][tmp.p] > tmp.d) { ^ user.cpp:32:39: 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:33:41: 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:34:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld", &N, &M); ^ user.cpp:35:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &K); ^ user.cpp:41:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld", &j); ^ user.cpp:50:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%ld %ld %ld", &s, &ff, &d); ^