View Compilation Error

0_0_15550529_18641.cpp: In function 'int main()':
0_0_15550529_18641.cpp:132:18: error: 'n' was not declared in this scope
   scanf("%d%d", &n, &m);
                  ^
0_0_15550529_18641.cpp:159:27: error: 'SAP' was not declared in this scope
   int ans = SAP(start, end);
                           ^