#include<bits/stdc++.h>
using namespace std;

using ll = long long;

#define CIN( LL , A ) LL A; cin >> A 
#define FOR_LL( VAR , INITIAL , FINAL_PLUS_ONE ) for( ll VAR = INITIAL ; VAR < FINAL_PLUS_ONE ; VAR ++ ) 
#define RETURN( ANSWER ) cout << ( ANSWER ) << endl; return 0 
#define MIN( A , B ) A < B ? A : B 

int main(){
  CIN( ll , N );
  CIN( ll , Q );
  ll A[100001];
  N++;
  FOR_LL( i , 1 , N ){
    cin >> A[i];
  }
  FOR_LL( i , 0 , Q ){
    CIN( ll , L );
    CIN( ll , R );
    CIN( ll , X );
    ll sum = 0;
    R++;
    FOR_LL( k , L , R ){
      sum += MIN( X , A[k] );
    }
    cout << sum << endl;
  }
  return 0;
}