Compilare: main.cpp:5:1: warning: 'typedef' was ignored in this declaration typedef struct Muchie {int e1,e2,cost;}; ^~~~~~~ main.cpp: In function 'void read()': main.cpp:11:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pscnv.in","r",stdin); ^ main.cpp:12:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d",&n,&m,&x,&y); ^ main.cpp:14:58: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &G[i].e1, &G[i].e2, &G[i].cost); ^ main.cpp: In function 'int main()': main.cpp:96:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("pscnv.out","w",stdout); ^