Language: C++

#include <iostream>
#include <iomanip>
#include <cassert>
#include <algorithm>
#include <functional>
#include <vector>
#include <string>
#include <cstring>
#include <stack>
#include <queue>
#include <map>
#include <bitset>
#include <sstream>
#include <istream>
#include <cmath>
#include <cstdio>
#include <complex>

using namespace std;

#define vci vector<int>
#define vcs vector<string>
#define pb push_back
#define sz size()
#define mapii map<int, int>
#define mapci map<char, int>
#define mapsi map<string, int>
#define all(x) x.begin(), x.end()
#define minit(a, i) memset(a, i, sizeof(a));

#define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
#define for_d(i, a, b) for (int i=(int)a-1; i>=b; i--)
#define for_r(i, a, b, c) for (int i=(int)a; i<(int)b; i += c)
#define for_dr(i, a, b, c) for (int i=(int)a-1; i>=b; i -= c)
#define FOR(i,c) for(__typeof((c).begin())i=(c).begin();i!=(c).end();++i)

template <class T> int __builtin_popcount(T n) { return n ? 1 + __builtin_popcount(n & (n - 1)) : 0; }

typedef long long ll;
typedef double D;

const int iINF = 2147483647;
const ll lINF = 9223372036854775807;

template <class T> inline void dbg(T t) { cout << t << endl; }





struct Part {
	int no, pos;
	
	Part (int no_, int pos_) : no(no_), pos(pos_) {}
};

int MAX = 1000000;
vector<Part> segpart;	// winner : segpart[0]


void init(int n) {
	segpart.assign(3*n, Part(MAX+1, 0));
	for_(k, 0, n + 1
void init(int n) {
	segpart.assign(3*n, Part(MAX+1, 0));
	for_(k, 0, n) {
		int k_ = k + n - 1;
		segprat[k_].no = k + 1;
	}
}) {
		int k_ = k + n - 1;
		segpart[k_].no = k;
	}
}

Part maxpart(Part p1, Part p2) {
	if (p1.pos < p2.pos) return p2;
	else if (p1.pos > p2.pos) return p1;
	
	// p1.pos == p2.pos
	if (p1.no > p2.no) return p2;
	return p1;
}

void add(int n, int k, int v) {
	k += n-1;
	segpart[k].pos += v;
	
	while (k > 0) {
		k = (k-1)/2;
		segpart[k] = maxpart(segpart[k*2+1], segpart[k*2+2]);
	}
}

int main() {
	int n, q; cin >> n >> q;
	
	init(n);
	
	for_(i, 0, q) {
		int a, v; cin >> a >> v;
		add(n, a, v);
		cout << segpart[0].no << " " << segpart[0].pos << endl;
	}
	
	return 0;	
}

Compiler output:
a.cc: In function 'void init(int)':
a.cc:64:1: error: expected ';' before 'void'
   64 | void init(int n) {
      | ^~~~
a.cc:31:49: note: in definition of macro 'for_'
   31 | #define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
      |                                                 ^
a.cc:64:1: error: expected primary-expression before 'void'
   64 | void init(int n) {
      | ^~~~
a.cc:31:49: note: in definition of macro 'for_'
   31 | #define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
      |                                                 ^
a.cc:64:1: error: expected ')' before 'void'
   64 | void init(int n) {
      | ^~~~
a.cc:31:49: note: in definition of macro 'for_'
   31 | #define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
      |                                                 ^
a.cc:31:27: note: to match this '('
   31 | #define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
      |                           ^
a.cc:63:9: note: in expansion of macro 'for_'
   63 |         for_(k, 0, n + 1
      |         ^~~~
a.cc:64:18: error: a function-definition is not allowed here before '{' token
   64 | void init(int n) {
      |                  ^
a.cc:31:49: note: in definition of macro 'for_'
   31 | #define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
      |                                                 ^
a.cc:63:14: error: 'k' was not declared in this scope
   63 |         for_(k, 0, n + 1
      |              ^
a.cc:31:52: note: in definition of macro 'for_'
   31 | #define for_(i, a, b) for (int i=(int)a; i<(int)b; i++)
      |                                                    ^