不知道怎么就RE了，请大佬看看吧！

#include <bits/stdc++.h>
using namespace std;

vector<string> delspace(vector<string> d){
	vector<string> d1;
	int sd = d.size();
	for (int i=0;i<sd;i++){
		if (d[i] != ""){
			d1.push_back(d[i]);
		}
	}
	return d1;
}

int main(){
	bool flag = 0;
	vector<string> bds,bds1;
	string sbds,ss = "";
	getline(cin,sbds);
	//cout << sbds << endl;
	for (int i=0;i<sbds.length();i++){
		if (sbds[i] == ' '){
			bds.push_back(ss);
			ss = "";
		} else if (i == sbds.length()-1){
			ss+= sbds[i];
			bds.push_back(ss);
			ss = "";
		} else {
			ss += sbds[i];
		}
//		cout << ss << " ";
	}
	int sts = bds.size();
	/*
	for (int i=0;i<sts;i++){
		cout << bds[i] << " ";
	}
	*/
	if(bds[sts-1] == "not" || bds[sts-1] == "and" || bds[sts-1] == "or" || bds[0] == "and" || bds[0] == "or"){
		cout << "error";
		return 0;	
	} 
	bds.swap(bds1);
	for (int i=sts-1;i>=0;i--){
		if (bds1[i] == "not"){
			if (bds1[i+1] == "true"){
				bds1[i] = "false";
			} else if (bds1[i+1] == "false"){
				bds1[i] = "true";
			} else {
				cout << "error";
				return 0;
			}
			bds1.erase(bds1.begin()+i); 
		}
	}
	
	for (int i=0;i<sts-1;i--){
		if (bds1[i] == "and"){
			if ((bds1[i-1] == "false") || (bds1[i+1] == "false")){
			bds1[i] = "false";
			} else if ((bds1[i-1] == "true") && (bds1[i+1] == "true")){
				bds1[i] = "true";
			} else {
				cout << "error";
				return 0;
			}
			bds1.erase(bds1.begin()+i);
			bds.erase(bds1.begin()+i-1-1);
		} else if(bds1[i] == "or") {
			if ((bds1[i-1] == "true") || (bds1[i+1] == "true")){
				bds1[i] = "true";
			} else if (((bds1[i-1] == "false") && (bds1[i+1] == "false"))){
				bds1[i] = "false";
			} else {
				cout << "error";
				return 0;
			}
			bds1.erase(bds1.begin()+i);
			bds.erase(bds1.begin()+i-1-1);
		}
	}
	bds1.swap(bds);
	for (int i=0;i<sts;i++){
		cout << bds[i] << " ";
	}
	
	return 0;
}