View Compilation Error

0_0_13945680_20288.cpp:27:5: error: stray '\250' in program
     while(l1<l2) {ret-=cnt[index(k-a[l1])];cnt[a[l1]]–;l1++;}
     ^
0_0_13945680_20288.cpp:28:5: error: stray '\250' in program
     while(l1>l2) {l1–;ret+=cnt[index(k-a[l1])];cnt[a[l1]]++;}
     ^
0_0_13945680_20288.cpp:30:5: error: stray '\250' in program
     while(r1>r2) {ret-=cnt[index(k-a[r1])];cnt[a[r1]]–;r1–;}
     ^
0_0_13945680_20288.cpp:30:5: error: stray '\250' in program
0_0_13945680_20288.cpp: In function 'void cal(int, int, int, int)':
0_0_13945680_20288.cpp:27:55: error: expected ';' before 'C'
     while(l1<l2) {ret-=cnt[index(k-a[l1])];cnt[a[l1]]–;l1++;}
                                                       ^
0_0_13945680_20288.cpp:28:22: error: expected ';' before 'C'
     while(l1>l2) {l1–;ret+=cnt[index(k-a[l1])];cnt[a[l1]]++;}
                      ^
0_0_13945680_20288.cpp:30:55: error: expected ';' before 'C'
     while(r1>r2) {ret-=cnt[index(k-a[r1])];cnt[a[r1]]–;r1–;}
                                                       ^
0_0_13945680_20288.cpp:30:60: error: expected ';' before 'C'
     while(r1>r2) {ret-=cnt[index(k-a[r1])];cnt[a[r1]]–;r1–;}
                                                            ^