Compilare: user.cpp: In function ‘int main()’: user.cpp:38:27: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!deq[sign[i]].empty() && i - deq[sign[i]].front() > y) { ^ user.cpp:38:55: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!deq[sign[i]].empty() && i - deq[sign[i]].front() > y) { ^ user.cpp:39:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] deq[sign[i]].pop_front(); ^ user.cpp:41:31: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!deq[sign[i - x]].empty() && v[deq[sign[i - x]].back()] > v[i - x]) { ^ user.cpp:41:61: warning: array subscript has type ‘char’ [-Wchar-subscripts] while(!deq[sign[i - x]].empty() && v[deq[sign[i - x]].back()] > v[i - x]) { ^ user.cpp:42:28: warning: array subscript has type ‘char’ [-Wchar-subscripts] deq[sign[i - x]].pop_back(); ^ user.cpp:44:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] deq[sign[i - x]].push_back(i - x); ^ user.cpp:45:24: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!deq[sign[i]].empty() && ans - (v[i] - v[deq[sign[i]].front()]) < 0) { ^ user.cpp:45:64: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!deq[sign[i]].empty() && ans - (v[i] - v[deq[sign[i]].front()]) < 0) { ^ user.cpp:46:39: warning: array subscript has type ‘char’ [-Wchar-subscripts] ans = v[i] - v[deq[sign[i]].front()]; ^ user.cpp:47:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] pos = deq[sign[i]].front() + 1; ^ user.cpp:48:34: warning: array subscript has type ‘char’ [-Wchar-subscripts] len = i - deq[sign[i]].front(); ^ user.cpp:24:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d %d " ,&n,&x,&y); ^ user.cpp:26:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%lf " ,&v[i]); ^