#include <iostream>
    using namespace std;
    int main() {
        int N, M, i, j;
        cin >> N >> M;
        int snow[10000] = {};
        for (i = 0; i <= N; i++) {
            snow[i] = 0;
        }
        for (i = 0; i < M; i++) {
            int comm, a, b, c;
            cin >> comm;
            if (comm == 1) {
                cin >> a >> b >> c;
                for (j = a; j < b; j++) {
                    snow[j] = snow[j] + c;
                }
            }
            if (comm == 2) {
                cin >> a >> b;
                int summ=0;
                for (j = a; j < b; j++) {
                    summ = summ + snow[j];
                }
                cout << summ << endl;
            }
        }
        return 0;
    }