Submission #345475

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Source Code Expand

#define REP(i,n) for(int i=0; i<(int)(n); i++)

#include <cstdio>
inline int getInt(){ int s; scanf("%d", &s); return s; }

#include <set>
using namespace std;

int query(int a, int b){
  printf("? %d %d\n", a, b);
  fflush(stdout);
  return getInt();
}

void ans(int a){
  printf("! %d\n", a);
  fflush(stdout);
}

int main(){
  const int n = getInt();

  pair<int, int> mx;
  REP(i,n-1){
    const int d = query(1, i + 2);
    mx = max(mx, make_pair(d, i + 2));
  }
  const int a = mx.second;
  mx = make_pair(0, 0);
  REP(i,n){
    if(a != i + 1){
      const int d = query(a, i + 1);
      mx = max(mx, make_pair(d, i + 1));
    }
  }

  ans(mx.first);

  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int getInt()’:
./Main.cpp:4:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result