#include <iostream>
#include <stdio.h>
#include <string>
using namespace std;

void snow(long long a, long long b, long long c, long long*l) {
	for (long long i = a - 1; i < b; i++) {
		l[i] += c;
	}
}
void sum(long long a, long long b, long long*l)
{
	long long m = 0;
	for (long long i = a - 1; i < b; i++) {
		m += l[i];
	}
	cout << m << '\n';
}


int main() {
	freopen("meteorology1d.in", "rt", stdin);
	freopen("meteorology1d.out", "wt", stdout);
	long long n, g;
	cin >> n >> g;
	string p;
	long long w, b, c;
	long long *a = new long long[n];
	for (long long i = 0; i < n; i++) {
		a[i] = 0;
	}
	for (long long i = 0; i < g; i++) {
		cin >> p;
		if (p == "snow") {
			cin >> w >> b >> c;
			snow(w, b, c, a);
		}
		if (p == "sum") {
			cin >> w >> b;
			sum(w, b, a);
		}
	}
	return 0;

}