Compilare: user.cpp: In function ‘void sol()’: user.cpp:91:9: warning: unused variable ‘rez’ [-Wunused-variable] int rez = 0; ^ user.cpp: In function ‘int main()’: user.cpp:101:9: warning: unused variable ‘t’ [-Wunused-variable] int t; ^ user.cpp: In function ‘void sol()’: user.cpp:76:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n"); ^ user.cpp:79:17: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(pa); pp = 0; ^ user.cpp: In function ‘int main()’: user.cpp:98:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in", "r", stdin); ^ user.cpp:99:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.out", "w", stdout); ^ /tmp/ccXZWE7a.o: In function `sol()': user.cpp:(.text+0x3b0): warning: the `gets' function is dangerous and should not be used.