Compilare: main.cpp: In function 'void task2()': main.cpp:64:16: warning: format '%d' expects a matching 'int' argument [-Wformat=] printf("%d"); ^ main.cpp:53:9: warning: unused variable 'i' [-Wunused-variable] int i,v,vis[verticesMax],dragon; ^ main.cpp: In function 'void read()': main.cpp:18:35: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&vertices,&edges); ^ main.cpp:20:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&dragons[i]); ^ main.cpp:23:38: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&v1,&v2,&cost); ^ main.cpp: In function 'int main()': main.cpp:68:36: 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:69:38: 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); ^ main.cpp:71:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&task); ^ main.cpp: In function 'void task2()': main.cpp:58:29: warning: 'dragon' may be used uninitialized in this function [-Wmaybe-uninitialized] if(!vis[vNew.to]&&vNew.cost<=dragon) { ~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~