View Compilation Error

0_0_15129474_8393.cpp: In function 'int main()':
0_0_15129474_8393.cpp:4:2: error: 'longint' was not declared in this scope
  longint n,m,i,s,t;
  ^
0_0_15129474_8393.cpp:5:24: error: 'n' was not declared in this scope
  while(scanf("%ld%ld",&n,&m)!=EOF){
                        ^
0_0_15129474_8393.cpp:5:27: error: 'm' was not declared in this scope
  while(scanf("%ld%ld",&n,&m)!=EOF){
                           ^
0_0_15129474_8393.cpp:6:3: error: 's' was not declared in this scope
   s=0,t=0;
   ^
0_0_15129474_8393.cpp:6:7: error: 't' was not declared in this scope
   s=0,t=0;
       ^
0_0_15129474_8393.cpp:7:7: error: 'i' was not declared in this scope
   for(i=n;i<=m;i++){
       ^