#include<bits/stdc++.h>
using namespace std;
bool ask(
int x,
int y){
printf("? %d %d\n",x,y);
fflush(stdout);
char buf[
4];
scanf("%s",buf);
return buf[
0]==
'x';
}
int work(){
if(ask(
0,
1))
return 1;
int l=
1,r,ans,mid;
while(ask(l*
2,l))l*=
2;
r=l*
2+
1,r=min(r,
1000000000);
while(l<=
r){
mid=l+r>>
1;
if(ask(mid,(mid+
1)/
2))
//mid小于猜的数
l=mid+
1;
else ans=mid,r=mid-
1;
}
return ans;
}
int main(){
char cmd[
32];
while(
1){
scanf("%s",cmd);
if(strcmp(cmd,
"start")==
0){
printf("! %d\n",work());
fflush(stdout);
}
else break;
}
}
转载于:https://www.cnblogs.com/zsben991126/p/10308270.html
相关资源：DirectX修复工具V4.0增强版
