提出 #1030373

---

ソースコード 拡げる

#include <cstdio>
#include <vector>

int main(void){
	using namespace std;
	
	vector<int> waitList[5];
	
	int groups;
	scanf("%d", &groups);
	
	for(int i = 1; i <= groups; ++i){
		int n;
		scanf("%d", &n);
		waitList[n].push_back(i);
	}
	
	int ans = 0, space = 4;
	while(waitList[1].size() || waitList[2].size() || waitList[3].size() || waitList[4].size()){
		int next = 0;
		for(int i = 1; i <= 4; ++i) if(waitList[i].size() && (!next || waitList[next].begin() > waitList[i].begin())) next = i;
		
		space -= next;
		waitList[next].erase(waitList[next].begin());
		
		int asain = space;
		while(space > 0 && asain > 0){
			if(!waitList[asain].size()) {
				--asain;
			}else{
				space -= asain;
				waitList[asain].erase(waitList[asain].begin());
				asain = space;
			}
		}
		
		++ans;
		space = 4;
	}
	
	printf("%d\n", ans);
return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:10:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &groups);
                      ^
./Main.cpp:14:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &n);
                  ^

ジャッジ結果