Compilare: main.cpp: In function 'void bellman_ford()': main.cpp:92:9: warning: unused variable 'nr' [-Wunused-variable] int nr=0; ^~ main.cpp: In function 'void citire()': main.cpp:20:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &v); ^ main.cpp:21:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n", &n, &m); ^ main.cpp:23:28: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d ", &d[i]); ^ main.cpp:27:40: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d\n", &x, &y, &c); ^ main.cpp: In function 'int main()': main.cpp:110:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.in", "r", stdin); ^ main.cpp:111:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("dragoni.out", "w", stdout); ^