Submission #904545

#	Time	Username	Problem	Language	Result	Execution time	Memory
904545		vjudge1	Land of the Rainbow Gold (APIO17_rainbow)	C++17	Compilation error	0 ms	0 KiB

rainbow

#include<stdio.h>
static int R, C, M, Q;
static int sr, sc;
static char S[100000 + 5];

using namespace std;
#include<bitset>

int was[200001];
int pref1[200005];
int pref2[200005];
int pref12[200005];
void init(int r,int c,int sr,int sc,int m,char* s){
    int px=sr,py=sc;
    was[py]|=(1<<px);
    for(int i=0;i<m;i++){
        char u=s[i];
        if(u=='S'){
            px++;
        }else if(u=='N'){
            px--;
        }else if(u=='E'){
            py++;
        }else{
            py--;
        }
        // cout<<px<<' '<<py<<endl;
        was[py]|=(1<<px);
    }
    for(int j=2;j<=c;j++){
        pref12[j]=pref12[j-1];
        if((was[j]==0 and was[j-1]==0) or (was[j]|was[j-1])>0){
        }else{
            pref12[j]++;
        }
    }
    for(int j=2;j<=c;j++){
        pref1[j]=pref1[j-1];
        pref2[j]=pref2[j-1];
        if((was[j]>>1)&1 and (was[j-1]>>1)&1){
            pref1[j]++;
        }
        if((was[j]>>2)&1 and (was[j-1]>>2)&1){
            pref2[j]++;
        }
    }
}
int colour(int lx,int ly,int rx,int ry){
    if(lx<rx){
        return pref12[ry]-pref12[ly];
    }else if(lx==1){
        return pref1[ry]-pref1[ly];
    }else{
        return pref2[ry]-pref2[ly];
    }
}
int main() {
    scanf("%d %d %d %d", &R, &C, &M, &Q);
    scanf("%d %d", &sr, &sc);
    if (M > 0) {
        scanf(" %s ", S);
    }

    init(R, C, sr, sc, M, S);

    int query;
    for (query = 0; query < Q; query++) {
        int ar, ac, br, bc;
        scanf("%d %d %d %d", &ar, &ac, &br, &bc);
        printf("%d\n", colour(ar, ac, br, bc));
    }

    return 0;
}

Compilation message (stderr)

rainbow.cpp: In function 'int main()':
rainbow.cpp:58:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   58 |     scanf("%d %d %d %d", &R, &C, &M, &Q);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
rainbow.cpp:59:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   59 |     scanf("%d %d", &sr, &sc);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~
rainbow.cpp:61:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         scanf(" %s ", S);
      |         ~~~~~^~~~~~~~~~~
rainbow.cpp:69:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         scanf("%d %d %d %d", &ar, &ac, &br, &bc);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccW5feEZ.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccBl5Bj2.o:rainbow.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status