提出 #374265

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ソースコード 拡げる

#include<cstdio>
#include<cstring>
#include<vector>
#include<queue>
#include<algorithm>
#include<cmath>
#include<climits>
#include<string>
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define reg(i,a,b) for(int i=(a);i<=(b);i++)
#define irep(i,n) for(int i=((int)(n))-1;i>=0;i--)
#define ireg(i,a,b) for(int i=(b);i>=(a);i--)
typedef long long int lli;
typedef pair<int,int> mp;
#define fir first
#define sec second
#define IINF INT_MAX
#define LINF LLONG_MAX





lli coss[100005]={};
int live[100005]={};
int tov[100005]={};

vector<mp> vs[100005];

int n;

void minco(int &p,int q){
	if(p==-1)p=q;
	else if(q!=-1 &&( coss[p]>coss[q]  || (coss[p]==coss[q] && p>q)))p=q;
}

int dfs(int no,int p){
	int res = -1;
	rep(i,vs[no].size()){
		int to = vs[no][i].fir,en = vs[no][i].sec;
		if(to==p)continue;
		if(live[en]==-1)continue;
		int mine = dfs(to,no);
		minco(res,mine);
		minco(res,en);
	}
	//printf("dfs.. %d %d %d\n",no,p,res);
	return res;
}


int main(void){
	scanf("%d",&n);
	reg(i,1,n-1){
		int a,b;
		lli c;
		scanf("%d%d%lld",&a,&b,&c);
		vs[a].push_back(mp(b,i));
		vs[b].push_back(mp(a,i));
		coss[i]=c;
		tov[i]=a;
	}
	
	int iq;
	scanf("%d",&iq);
	if(n>1005 || iq>1005)return 0;
	
	rep(i,iq){
		int iiq;
		scanf("%d",&iiq);
		if(iiq==1){
			int a; lli b;
			scanf("%d%lld",&a,&b);
			if(live[a]==-1)continue;
			coss[a]+=b;
			//printf("es .. %d %d %lld\n",a,live[a],coss[a]);
		}
		else{
			int a;
			scanf("%d",&a);
			if(live[a]==-1){
				printf("-1\n");
			}
			else{
				int sv = tov[a];
				int mine = dfs(sv,-100);
				if(mine==-1){
					mine=0;
					mine=mine/mine;
				}
				printf("%d\n",mine);
				live[mine]=-1;
			}
		}
	}
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:54:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
                ^
./Main.cpp:58:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%lld",&a,&b,&c);
                             ^
./Main.cpp:66:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&iq);
                 ^
./Main.cpp:71:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&iiq);
                   ^
./Main.cpp:74:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d%lld",&a,&b);
                         ^
./Mai...

ジャッジ結果