Compilare: main.cpp: In function 'int main()': main.cpp:13:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;i++) ^~~ main.cpp:15:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(c[o]=0,s[l]=o,i=1;i<=l;i++) ^~~ main.cpp:10:84: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("bfs.in","r",stdin),freopen("bfs.out","w",stdout),scanf("%d%d%d",&n,&m,&o); ^ main.cpp:10:84: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:10:84: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] main.cpp:12:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&i,&j),a[i].P(j); ^