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#include <bits/stdc++.h>

#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define FORD(i, a, b) for(int i = (a); i >= (b); --i)
#define VAR(v, i) __typeof(i) v=(i)
#define FORE(i, c) for(VAR(i, (c).begin()); i != (c).end(); ++i)
#define all(v) (v).begin(),(v).end()

#define VI vector<int>
#define PII pair<int,int>
#define st first
#define nd second
#define mp make_pair
#define pb push_back
#define lint long long int

#define debug(x) {cerr <<#x <<" = " <<x <<endl; }
#define debug2(x,y) {cerr <<#x <<" = " <<x << ", "<<#y<<" = "<< y <<endl; } 
#define debug3(x,y,z) {cerr <<#x <<" = " <<x << ", "<<#y<<" = "<< y << ", " << #z << " = " << z <<endl; } 
#define debugv(x) {{cerr <<#x <<" = "; FORE(itt, (x)) cerr <<*itt <<", "; cerr <<endl; }}
#define debugt(t,n) {{cerr <<#t <<" = "; FOR(it,0,(n)) cerr <<t[it] <<", "; cerr <<endl; }}

#define make( x) int (x); scanf("%d",&(x));
#define make2( x, y) int (x), (y); scanf("%d%d",&(x),&(y));
#define make3(x, y, z) int (x), (y), (z); scanf("%d%d%d",&(x),&(y),&(z));
#define make4(x, y, z, t) int (x), (y), (z), (t); scanf("%d%d%d%d",&(x),&(y),&(z),&(t));
#define makev(v,n) VI (v); FOR(i,0,(n)) { make(a); (v).pb(a);} 
#define IOS ios_base::sync_with_stdio(0)
#define HEAP priority_queue

#define read( x) scanf("%d",&(x));
#define read2( x, y) scanf("%d%d",&(x),&(y));
#define read3(x, y, z) scanf("%d%d%d",&(x),&(y),&(z));
#define read4(x, y, z, t) scanf("%d%d%d%d",&(x),&(y),&(z),&(t));
#define readv(v,n) FOR(i,0,(n)) { make(a); (v).pb(a);}

using namespace std;

vector<int> speed;
int n,N;

struct info{
  lint sumH, days, set_val, sumSpeed, minH;
  int len;
  info( lint sumH_, lint days_ ,lint set_val_ ,lint minH_, lint ss ,  int lenn ){
    sumH = sumH_;
    days = days_;
    set_val = set_val_;
    sumSpeed = ss;
    len = lenn;
    minH = minH_;
  }

  info(){}
};

vector<info> rt;

void init(){
  for(N=1; N<n; N<<=1);
  rt = vector<info>(N<<1);
  FOR(i,0,n) rt[i+N] = info(0,0,-1,0,speed[i],1);
  FOR(i,n,N) rt[i+N] = info(0,0,-1,0,0,0);
  FORD(i,N-1,1){
    rt[i] = info(0,0,-1,0,rt[2*i].sumSpeed + rt[2*i+1].sumSpeed, rt[2*i].len + rt[2*i+1].len);
  }
}

inline void przepchaj(int v, int l, int r){
  if(v>=N) return;
  if (rt[v].set_val != -1) {
    rt[2*v].sumH = rt[2*v].len*rt[v].set_val;
    rt[2*v].set_val = rt[v].set_val;
    rt[2*v].days = 0;
    rt[2*v].minH = rt[v].set_val;
    
    rt[2*v+1].sumH = rt[2*v+1].len*rt[v].set_val;
    rt[2*v+1].set_val = rt[v].set_val;
    rt[2*v+1].days = 0;
    rt[2*v+1].minH = rt[v].set_val;

    rt[v].set_val = -1;
  }
  if (rt[v].days != 0) {
    rt[2*v].sumH += rt[2*v].sumSpeed*rt[v].days;
    rt[2*v].days += rt[v].days;
    rt[2*v].minH += rt[v].days*1LL*speed[l];

    rt[2*v+1].sumH += rt[2*v+1].sumSpeed*rt[v].days;
    rt[2*v+1].days += rt[v].days;
    rt[2*v+1].minH += rt[v].days*1LL*speed[(l+r)/2 + 1];
    rt[v].days = 0;
  } 
}

// w przedziale x,y reprezentowanym przez v
// szukaj przedziału l,r 
void set_value(int v, int x, int y, int l, int r, lint H){
  if(l > r) return ;
  if( l == x &&  r == y){
    rt[v].days = 0;
    rt[v].sumH = H*rt[v].len;
    rt[v].set_val = H;
    rt[v].minH = H;
    return ;
  }
  przepchaj(v,x,y);
  int mid = (x+y)/2;
  set_value(2*v,x,mid,l,min(r,mid),H);
  set_value(2*v+1,mid+1,y,max(l,mid+1),r,H);
  rt[v].sumH = rt[2*v].sumH + rt[2*v+1].sumH;
  rt[v].minH = rt[2*v].minH;
}

lint get_valCD(int v, int x, int y, int l, int r){
  if(l > r) return 0;
  if( l == x &&  r == y){
    return rt[v].sumH;
  }
  przepchaj(v,x,y);
  int mid = (x+y)/2;
  lint val1 = get_valCD(2*v,x,mid,l,min(r,mid));
  lint val2 = get_valCD(2*v+1,mid+1,y,max(l,mid+1),r);
  return val1+val2;
}

void add_days(int v, int x, int y, int l, int r, lint d){
  if(l > r) return; 
  if( l == x &&  r == y){
    rt[v].sumH += d*rt[v].sumSpeed;
    rt[v].days += d;
    rt[v].minH += d*speed[l];
    return;
  }
  przepchaj(v,x,y);
  int mid = (x+y)/2;
  add_days(2*v,x,mid,l,min(r,mid),d);
  add_days(2*v+1,mid+1,y,max(l,mid+1),r,d);
  rt[v].minH = rt[2*v].minH;
}





int find(lint b){
  int v = 1, x = 0, y = N-1;
  if(rt[v].minH>=b) return -1;
  while(v<N){
    przepchaj(v,x,y);
    int mid = (x+y)/2;
    if(n-1<=mid){
      y = mid;
      v = 2*v;
    } else {
      if(rt[2*v+1].minH>=b){
        v = 2*v;
        y = (x+y)/2;
      }
      else{
        v = 2*v+1;
        x = (x+y)/2+1;
      }
    }
  }
  return v-N;
}

int main(){
  int m;
  scanf("%d %d", &n, &m);
  for (int i = 0; i < n; i++) {
    int v;
    scanf("%d", &v);
    speed.push_back(v);
  }
  sort(speed.begin(), speed.end());
  init();
  lint lastd = 0;
  for (int i = 0; i < m; i++) {
    lint d, b;
    scanf("%lld %lld", &d, &b);
    lint diff = d-lastd;
    lastd = d;
    add_days(1,0,N-1,0,n-1,diff);

    lint maxH = get_valCD(1,0,N-1,n-1,n-1);
    if(maxH < b){
      printf("0\n");
    }
    else{ 
      int k = find(b);
      k++;
      lint answer = get_valCD(1,0,N-1,k,n-1)  - b*1LL*(n-k);
      set_value(1,0,N-1,k,n-1,b);
      printf("%lld\n",answer);
    }
    
  }
}