#include <fstream>
using namespace std;
#define maxn 100001
ifstream cin("abi.in");
ofstream cout("abi.out");
int N,M,s[maxn],op;

void read(int N){
    s[0]=0;
    for(int i=1; i<=N; i++){
        cin>>s[i];
        s[i]+=s[i-1];
    }
}

void solve(int op){
    int x,y;
    if(op==0){
        cin>>x>>y;
        for(;x<=N; x++)
            s[x]+=y;
    } else if(op==1){
        cin>>x>>y;
        cout<<s[y]-s[x-1]<<'\n';
    }else if(op==2){
        int ok=1,i;
        cin>>x;
        for(i=1; i<=N&&ok&&s[i]<=x; i++){
            if(s[i]==x)
                ok=0;
        }
        if(ok==0)
            cout<<i-1<<'\n';
        else cout<<-1<<'\n';
    }
}

int main()
{
    cin>>N>>M;
    read(N);
    for(;M;M--){
        cin>>op;
        solve(op);
    }

}