Compilare: user.cpp: In function ‘int main()’: user.cpp:30:64: warning: operation on ‘v[y[(i + -1)]]’ may be undefined [-Wsequence-point] x[i++]=c,v[x[i-1]]+=v[y[i-1]]-(v[y[i-1]]=v[x[i-1]]); ^ user.cpp:32:64: warning: operation on ‘v[y[(j + 1)]]’ may be undefined [-Wsequence-point] x[j--]=c,v[x[j+1]]+=v[y[j+1]]-(v[y[j+1]]=v[x[j+1]]); ^ user.cpp:9:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("egipt.in","r",stdin); ^ user.cpp:11:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:14:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i]); ^