Submission #434177

#	Time	Username	Problem	Language	Result	Execution time	Memory
434177		vanic	Handcrafted Gift (IOI20_gift)	C++14	Compilation error	0 ms	0 KiB

gift

#include "gift.h"
#include <iostream>
#include <cmath>
#include <algorithm>
#include <vector>

using namespace std;

const int maxn=5e5+5;
const string s="RB";


int pref[maxn];
int poz[maxn];
int neg[maxn];
string sol;

int construct(int n, int r, vector<int> a, vector<int> b, vector<int> x) {
	for(int i=0; i<r; i++){
		if(x[i]==1){
			poz[a[i]]++;
			neg[b[i]+1]++;
		}
	}
	int sw=0;
	bool p=0;
	for(int i=0; i<n; i++){
		sw-=neg[i];
		if(!sw){
			p^=1;
		}
		sw+=poz[i];
		pref[i+1]=pref[i]+p;
		sol.push_back(s[p]);
	}
	for(int i=0; i<r; i++){
		if(x[i]==2 && (pref[b[i]+1]-pref[a[i]]==0 || pref[b[i]+1]-pref[a[i]]==b[i]-a[i]+1)){
				return 0;
			}
		}
	}
	craft(sol);
	return 1;
}

Compilation message (stderr)

gift.cpp:42:7: error: expected constructor, destructor, or type conversion before '(' token
   42 |  craft(sol);
      |       ^
gift.cpp:43:2: error: expected unqualified-id before 'return'
   43 |  return 1;
      |  ^~~~~~
gift.cpp:44:1: error: expected declaration before '}' token
   44 | }
      | ^
gift.cpp: In function 'int construct(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
gift.cpp:41:2: warning: control reaches end of non-void function [-Wreturn-type]
   41 |  }
      |  ^