提出 #35722760

---

ソースコード 拡げる

#include <algorithm>  
#include <iostream>  
#include <sstream>  
#include <string>  
#include <vector>  
#include <queue>  
#include <set>  
#include <map>  
#include <cstdio>  
#include <cstdlib>  
#include <cctype>  
#include <cmath>  
#include <cstring>
#include <list>  
#include <cassert>
#include <climits>
#include <bitset>
#include <chrono>
#include <random>
using namespace std;

#define PB push_back  
#define MP make_pair  
#define SZ(v) ((int)(v).size())  
#define FOR(i,a,b) for(int i=(a);i<(b);++i)  
#define REP(i,n) FOR(i,0,n)  
#define FORE(i,a,b) for(int i=(a);i<=(b);++i)  
#define REPE(i,n) FORE(i,0,n)  
#define FORSZ(i,a,v) FOR(i,a,SZ(v))  
#define REPSZ(i,v) REP(i,SZ(v))  
std::mt19937 rnd((int)std::chrono::steady_clock::now().time_since_epoch().count());
typedef long long ll;
ll gcd(ll a, ll b) { return b == 0 ? a : gcd(b, a % b); }

const int MAXN = 200000;

int n;
char a[MAXN + 1];
char b[MAXN + 1];
char ans[MAXN + 1];

bool solve() {
	REP(i, n) ans[i] = '?'; ans[n] = '\0';
	vector<int> diff;
	REP(i, n) if (a[i] == b[i]) ans[i] = '0'; else diff.PB(i);
	if (SZ(diff) % 2 != 0) return false;
	int want = SZ(diff) / 2, cnta = 0, cntb = 0;
	for (int idx : diff) {
		if (cnta == want) ans[idx] = b[idx], ++cntb;
		else if (cntb == want) ans[idx] = a[idx], ++cnta;
		else if (a[idx] == '0') ans[idx] = '0', ++cnta;
		else ans[idx] = '0', ++cntb;
	}
	return true;
}

void run() {
	scanf("%d", &n);
	scanf("%s", a);
	scanf("%s", b);
	if (!solve()) { printf("-1\n"); return; }
	printf("%s\n", ans);
}

int main() {
	run();
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘bool solve()’:
./Main.cpp:25:20: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation]
   25 | #define FOR(i,a,b) for(int i=(a);i<(b);++i)
      |                    ^~~
./Main.cpp:26:18: note: in expansion of macro ‘FOR’
   26 | #define REP(i,n) FOR(i,0,n)
      |                  ^~~
./Main.cpp:43:2: note: in expansion of macro ‘REP’
   43 |  REP(i, n) ans[i] = '?'; ans[n] = '\0';
      |  ^~~
./Main.cpp:43:26: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘for’
   43 |  REP(i, n) ans[i] = '?'; ans[n] = '\0';
      |                          ^~~
./Main.cpp: In function ‘void run()’:
./Main.cpp:58:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   58 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
./Main.cpp:59:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   59 |  scanf("%s", a);
      |  ~~~~~^~~~~~~~~
./Main.cpp:60:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   60 |  scanf("%s", b);
      |  ~~~~~^~~~~~~~~

ジャッジ結果