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| #include <cstdio>
using namespace std;
using LL = long long;
const int N = 1000001;
int n, q, x, y, z;
LL c[N];
int lowbit(int x) {
return x & -x;
}
void add(int i, int k) {
for (; i <= n; i += lowbit(i))
c[i] += k;
}
LL getSum(int i) {
LL s = 0;
for (; i > 0; i -= lowbit(i))
s += c[i];
return s;
}
int main() {
scanf("%d%d", &n, &q);
for (int i = 1; i <= n; ++i) {
scanf("%d", &x);
c[i] += x;
int j = i + lowbit(i);
if (j <= n)
c[j] += c[i];
}
for (int i = 0; i < q; ++i) {
scanf("%d%d%d", &x, &y, &z);
if (x == 1)
add(y, z);
else
printf("%lld\n", getSum(z) - getSum(y - 1));
}
return 0;
}
|