Problem p00099 (C++)

Buggy submission (status: Runtime Error):
#include <algorithm>
#include <bitset>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<long long, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<long long, long long> ll_ll;
typedef pair<double, double> d_d;

#define PI 3.141592653589793238462643383279
#define mod 1000000007LL
#define rep(i, n) for (i = 0; i < n; ++i)
#define rep1(i, n) for (i = 1; i < n; ++i)
#define rep2d(i, j, n)                                                         \
  for (i = 0; i < n; ++i)                                                      \
    for (j = i + 1; j < n; ++j)
#define per(i, n) for (i = n - 1; i > -1; --i)
#define int(x)                                                                 \
  int x;                                                                       \
  scanf("%d", &x)
#define int2(x, y)                                                             \
  int x, y;                                                                    \
  scanf("%d%d", &x, &y)
#define int3(x, y, z)                                                          \
  int x, y, z;                                                                 \
  scanf("%d%d%d", &x, &y, &z)
#define scn(n, a) rep(i, n) cin >> a[i]
#define sc2n(n, a, b) rep(i, n) cin >> a[i] >> b[i]
#define pri(x) cout << x << "\n"
#define pri2(x, y) cout << x << " " << y << "\n"
#define pri3(x, y, z) cout << x << " " << y << " " << z << "\n"
#define pb push_back
#define mp make_pair
#define all(a) (a).begin(), (a).end()
#define endl "\n"
#define kabe puts("---------------------------")
#define kara puts("")
#define debug(x) cout << " --- " << x << "\n"
#define debug2(x, y) cout << " --- " << x << " " << y << "\n"
#define debug3(x, y, z) cout << " --- " << x << " " << y << " " << z << "\n"
#define X first
#define Y second
#define eps 0.0001
#define prid(x) printf("%.15lf\n", x)

bool mycom(i_i a, i_i b) {
  if (a.X == b.X)
    return a.Y < b.Y;
  return a.X > b.X;
}

signed main(void) {
  int i, j, k;
  int a[25] = {1};
  rep1(i, 25) a[i] = a[i - 1] * 2;
  for (int testcase = 0; testcase < 1234567; testcase++) {
    int2(n, q);
    rep(i, 25) if (n <= a[i]) break;

    vector<i_i> sgt;
    sgt.resize(a[i]);
    rep(j, a[i + 1]) sgt[j] = mp(-123, n + 1);
    sgt[0] = mp(i, a[i]);

    rep(i, n) sgt[sgt[0].Y + i] = mp(0, i + 1);

    for (; q--;) {
      int2(x, v);
      x = sgt[0].Y + x - 1;
      if (v > 0) {
        sgt[x].X += v;
        for (; x != 1; x /= 2) {
          if (mycom(sgt[x], sgt[x / 2]))
            sgt[x / 2] = sgt[x];
          else
            break;
        }
      } else {
        sgt[x].X += v;
        for (; x != 1; x /= 2) {
          if (mycom(sgt[(x / 2) * 2], sgt[(x / 2) * 2 + 1]))
            sgt[x / 2] = sgt[(x / 2) * 2];
          else
            sgt[x / 2] = sgt[(x / 2) * 2 + 1];
        }
      }
      pri2(sgt[1].Y, sgt[1].X);
    }

    /*/

    //*/
    break;
  }
  return 0;
}

Fixed submission:
#include <algorithm>
#include <bitset>
#include <cfloat>
#include <climits>
#include <cmath>
#include <complex>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <deque>
#include <functional>
#include <iostream>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <vector>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef pair<int, int> i_i;
typedef pair<long long, int> ll_i;
typedef pair<double, int> d_i;
typedef pair<long long, long long> ll_ll;
typedef pair<double, double> d_d;

#define PI 3.141592653589793238462643383279
#define mod 1000000007LL
#define rep(i, n) for (i = 0; i < n; ++i)
#define rep1(i, n) for (i = 1; i < n; ++i)
#define rep2d(i, j, n)                                                         \
  for (i = 0; i < n; ++i)                                                      \
    for (j = i + 1; j < n; ++j)
#define per(i, n) for (i = n - 1; i > -1; --i)
#define int(x)                                                                 \
  int x;                                                                       \
  scanf("%d", &x)
#define int2(x, y)                                                             \
  int x, y;                                                                    \
  scanf("%d%d", &x, &y)
#define int3(x, y, z)                                                          \
  int x, y, z;                                                                 \
  scanf("%d%d%d", &x, &y, &z)
#define scn(n, a) rep(i, n) cin >> a[i]
#define sc2n(n, a, b) rep(i, n) cin >> a[i] >> b[i]
#define pri(x) cout << x << "\n"
#define pri2(x, y) cout << x << " " << y << "\n"
#define pri3(x, y, z) cout << x << " " << y << " " << z << "\n"
#define pb push_back
#define mp make_pair
#define all(a) (a).begin(), (a).end()
#define endl "\n"
#define kabe puts("---------------------------")
#define kara puts("")
#define debug(x) cout << " --- " << x << "\n"
#define debug2(x, y) cout << " --- " << x << " " << y << "\n"
#define debug3(x, y, z) cout << " --- " << x << " " << y << " " << z << "\n"
#define X first
#define Y second
#define eps 0.0001
#define prid(x) printf("%.15lf\n", x)

bool mycom(i_i a, i_i b) {
  if (a.X == b.X)
    return a.Y < b.Y;
  return a.X > b.X;
}

signed main(void) {
  int i, j, k;
  int a[25] = {1};
  rep1(i, 25) a[i] = a[i - 1] * 2;
  for (int testcase = 0; testcase < 1234567; testcase++) {
    int2(n, q);
    rep(i, 25) if (n <= a[i]) break;

    vector<i_i> sgt;
    sgt.resize(a[i + 1]);
    rep(j, a[i + 1]) sgt[j] = mp(-123, n + 1);
    sgt[0] = mp(i, a[i]);

    rep(i, n) sgt[sgt[0].Y + i] = mp(0, i + 1);

    for (; q--;) {
      int2(x, v);
      x = sgt[0].Y + x - 1;
      if (v > 0) {
        sgt[x].X += v;
        for (; x != 1; x /= 2) {
          if (mycom(sgt[x], sgt[x / 2]))
            sgt[x / 2] = sgt[x];
          else
            break;
        }
      } else {
        sgt[x].X += v;
        for (; x != 1; x /= 2) {
          if (mycom(sgt[(x / 2) * 2], sgt[(x / 2) * 2 + 1]))
            sgt[x / 2] = sgt[(x / 2) * 2];
          else
            sgt[x / 2] = sgt[(x / 2) * 2 + 1];
        }
      }
      pri2(sgt[1].Y, sgt[1].X);
    }

    /*/

    //*/
    break;
  }
  return 0;
}