제출 #238088

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
238088		m3r8	Flood (IOI07_flood)	C++14	0 / 100	5 ms	256 KiB

flood

#include <stdio.h>

int buf[400000];

int main(int argc, char ** argv){
  if(argc > 2){
    freopen(argv[1],"r",stdin);
    int n;
    scanf("%d",&n);
    int a;
    for(int i = 0;i<n;i++){
      scanf("%d",&a);  
      buf[a] = 1;
    };
    freopen(argv[2],"r",stdin);
    scanf("%d",&n);
    for(int i = 0;i<n;i++){
      scanf("%d",&a);  
      if(!buf[a]){
        printf("fehler bei %d\n",a);  
      };
    };
  };
  return 0;
};

컴파일 시 표준 에러 (stderr) 메시지

flood.cpp: In function 'int main(int, char**)':
flood.cpp:7:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(argv[1],"r",stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~
flood.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
flood.cpp:12:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d",&a);  
       ~~~~~^~~~~~~~~
flood.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
     freopen(argv[2],"r",stdin);
     ~~~~~~~^~~~~~~~~~~~~~~~~~~
flood.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
     ~~~~~^~~~~~~~~
flood.cpp:18:12: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
       scanf("%d",&a);  
       ~~~~~^~~~~~~~~

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