题解

#include <iostream>
#include <memory.h>
#include <cstdio>
#include <vector>
#include <set>
using namespace std;
struct node{
int a[6] = {0};
};
vector <node> v;
int a[100005];
char b[100005];
int main(){
int t, __ct = 0;
cin >> t;
if(0){error: cout << "ERR\n";}
if(0){fail: cout << "FAIL\n";}
while(t--){
__ct++;

	memset(a, 0, 1000);
	memset(b, 0, 1000);
	string tmp, str;
	cin >> tmp >> str;
	int ct = 1, i;
	if(!isdigit(str[0])) goto error;
	for(i = 0; str[i] != '\0'; i++){
		if(!isdigit(str[i])){
			if(ct <= 4 && a[ct] > 255 || a[ct] > 65535 || i && !isdigit(str[i - 1])) goto error;
			b[ct++] = str[i];
		}
		else{
			if(a[ct] == 0 && str[i] == '0' && isdigit(str[i + 1])) goto error;
			a[ct] = a[ct] * 10 + str[i] - '0';
            if(ct <= 4 && a[ct] > 255 || a[ct] > 65535) goto error;
		}
	}
	if(ct != 5 || a[5] > 65535 || !isdigit(str[i - 1])) goto error;
	for(int i = 1; i <= 3; i++){
		if(b[i] != '.') goto error;
	}
	if(b[4] != ':') goto error;
	
	if(tmp == "Server"){
		for(auto it:v){
			bool flag = 1;
			for(int i = 1; i <= 5; i++) if(it.a[i] != a[i]) flag = 0;
			if(flag) goto fail;
		}
		cout << "OK\n";
		node tmp;
		for(int i = 1; i <= 5; i++) tmp.a[i] = a[i];
        tmp.a[0] = __ct;
		v.push_back(tmp);
	}else{
		int idx = -1;
		for(int i = 0; i < v.size(); i++){
			bool flag = 1;
			for(int j = 1; j <= 5; j++){
				if(v[i].a[j] != a[j]) flag = 0;
			}
			if(flag){
				idx = v[i].a[0];
				break;
			}
		}
		if(idx == -1) goto fail;
		cout << idx << endl;
	}
}

return 0;

}