#include <bits/stdc++.h>
using namespace std;
const int mxN=2e5;
int n, q, a, b, segtree[1<<19];
char op;
void update(int s, int x, int i=1, int l=0, int r=n-1) {
segtree[i]=min(x, segtree[i]);
if(l==r) return;
int m=(l+r)/2;
if(s<=m) update(s, x, 2*i, l, m);
else update(s, x, 2*i+1, m+1, r);
}
int query(int s, int x, int i=1, int l=0, int r=n-1) {
if(segtree[i]>x) return -2;
if(l==r) return l;
int m=(l+r)/2, r=-2;
if(s<=m) r=query(s, x, 2*i, l, m);
if(r==-2) r=query(s, x, 2*i+1, m+1, r);
return r;
}
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
cin >> n >> q;
memset(segtree, 0x3f, sizeof(segtree));
while(q--) {
cin >> op >> a >> b, --b;
if(op=='M') update(b, a);
else cout << query(b, a)+1 << "\n";
}
}
Compilation message
deda.cpp: In function 'int query(int, int, int, int, int)':
deda.cpp:19:17: error: declaration of 'int r' shadows a parameter
19 | int m=(l+r)/2, r=-2;
| ^
deda.cpp:16:47: note: 'int r' previously declared here
16 | int query(int s, int x, int i=1, int l=0, int r=n-1) {
| ~~~~^~~~~
